VOOZH about

URL: https://cwe.mitre.org/data/definitions/1019.html

⇱ CWE - CWE-1019: CWE CATEGORY: Validate Inputs (4.20)

👁 CWE

Common Weakness Enumeration

A community-developed list of SW & HW weaknesses that can become vulnerabilities

👁 New to CWE? click here!
👁 CWE Most Important Hardware Weaknesses
👁 CWE Top 25 Most Dangerous Weaknesses
Home > CWE List > CWE- Individual Dictionary Definition (4.20)  
CWE Glossary Definition
 👁 x

CWE CATEGORY: Validate Inputs

Category ID: 1019
Vulnerability Mapping: PROHIBITED This CWE ID must not be used to map to real-world vulnerabilities
👁 +
Summary
Weaknesses in this category are related to the design and architecture of a system's input validation components. Frequently these deal with sanitizing, neutralizing and validating any externally provided inputs to minimize malformed data from entering the system and preventing code injection in the input data. The weaknesses in this category could lead to a degradation of the quality of data flow in a system if they are not addressed when designing or implementing a secure architecture.
👁 +
Membership
Nature Type ID Name
MemberOf 👁 View
View - a subset of CWE entries that provides a way of examining CWE content. The two main view structures are Slices (flat lists) and Graphs (containing relationships between entries).		 1008 Architectural Concepts
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 20 Improper Input Validation
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 59 Improper Link Resolution Before File Access ('Link Following')
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 76 Improper Neutralization of Equivalent Special Elements
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 90 Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 91 XML Injection (aka Blind XPath Injection)
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 94 Improper Control of Generation of Code ('Code Injection')
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 96 Improper Neutralization of Directives in Statically Saved Code ('Static Code Injection')
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 97 Improper Neutralization of Server-Side Includes (SSI) Within a Web Page
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 98 Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 99 Improper Control of Resource Identifiers ('Resource Injection')
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 138 Improper Neutralization of Special Elements
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 150 Improper Neutralization of Escape, Meta, or Control Sequences
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 349 Acceptance of Extraneous Untrusted Data With Trusted Data
HasMember 👁 Composite
Composite - a Compound Element that consists of two or more distinct weaknesses, in which all weaknesses must be present at the same time in order for a potential vulnerability to arise. Removing any of the weaknesses eliminates or sharply reduces the risk. One weakness, X, can be "broken down" into component weaknesses Y and Z. There can be cases in which one weakness might not be essential to a composite, but changes the nature of the composite when it becomes a vulnerability.		 352 Cross-Site Request Forgery (CSRF)
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 472 External Control of Assumed-Immutable Web Parameter
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 473 PHP External Variable Modification
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 502 Deserialization of Untrusted Data
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 601 URL Redirection to Untrusted Site ('Open Redirect')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 641 Improper Restriction of Names for Files and Other Resources
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 643 Improper Neutralization of Data within XPath Expressions ('XPath Injection')
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 652 Improper Neutralization of Data within XQuery Expressions ('XQuery Injection')
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 790 Improper Filtering of Special Elements
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 791 Incomplete Filtering of Special Elements
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 792 Incomplete Filtering of One or More Instances of Special Elements
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 793 Only Filtering One Instance of a Special Element
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 794 Incomplete Filtering of Multiple Instances of Special Elements
HasMember 👁 Base
Base - a weakness that is still mostly independent of a resource or technology, but with sufficient details to provide specific methods for detection and prevention. Base level weaknesses typically describe issues in terms of 2 or 3 of the following dimensions: behavior, property, technology, language, and resource.		 795 Only Filtering Special Elements at a Specified Location
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 796 Only Filtering Special Elements Relative to a Marker
HasMember 👁 Variant
Variant - a weakness that is linked to a certain type of product, typically involving a specific language or technology. More specific than a Base weakness. Variant level weaknesses typically describe issues in terms of 3 to 5 of the following dimensions: behavior, property, technology, language, and resource.		 797 Only Filtering Special Elements at an Absolute Position
HasMember 👁 Class
Class - a weakness that is described in a very abstract fashion, typically independent of any specific language or technology. More specific than a Pillar Weakness, but more general than a Base Weakness. Class level weaknesses typically describe issues in terms of 1 or 2 of the following dimensions: behavior, property, and resource.		 943 Improper Neutralization of Special Elements in Data Query Logic
👁 +
Vulnerability Mapping Notes

Usage: PROHIBITED

(this CWE ID must not be used to map to real-world vulnerabilities)

Reason: Category

Rationale:

This entry is a Category. Using categories for mapping has been discouraged since 2019. Categories are informal organizational groupings of weaknesses that can help CWE users with data aggregation, navigation, and browsing. However, they are not weaknesses in themselves.

Comments:

See member weaknesses of this category.
👁 +
References
[REF-9] Santos, J. C. S., Tarrit, K. and Mirakhorli, M.. "A Catalog of Security Architecture Weaknesses.". 2017 IEEE International Conference on Software Architecture (ICSA). 2017. <https://design.se.rit.edu/papers/cawe-paper.pdf>.
[REF-10] Santos, J. C. S., Peruma, A., Mirakhorli, M., Galster, M. and Sejfia, A.. "Understanding Software Vulnerabilities Related to Architectural Security Tactics: An Empirical Investigation of Chromium, PHP and Thunderbird.". pages 69 - 78. 2017 IEEE International Conference on Software Architecture (ICSA). 2017. <https://design.se.rit.edu/papers/TacticalVulnerabilities.pdf>.
👁 +
Content History
👁 +
Submissions
Submission Date Submitter Organization
2017-06-22
(CWE 2.12, 2017-11-08) 		Joanna C.S. Santos, Mehdi Mirakhorli
Provided the catalog, Common Architectural Weakness Enumeration (CAWE), and research papers for this view.
👁 +
Modifications
Modification Date Modifier Organization
2023-06-29
(CWE 4.12, 2023-06-29) 		CWE Content Team MITRE
updated Mapping_Notes
2023-04-27
(CWE 4.11, 2023-04-27) 		CWE Content Team MITRE
updated Mapping_Notes
More information is available — Please edit the custom filter or select a different filter.
Page Last Updated: April 30, 2026

Use of the Common Weakness Enumeration (CWE™) and the associated references from this website are subject to the Terms of Use. CWE is sponsored by the U.S. Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) and managed by the Homeland Security Systems Engineering and Development Institute (HSSEDI) which is operated by The MITRE Corporation (MITRE). Copyright © 2006–2026, The MITRE Corporation. CWE, CWSS, CWRAF, and the CWE logo are trademarks of The MITRE Corporation.