CVE-2021-26084
Detail
Description
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
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This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference
CISA's BOD 22-01 and Known
Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name |
Date Added |
Due Date |
Required Action |
| Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability |
11/03/2021 |
11/17/2021 |
Apply updates per vendor instructions. |
Change History
24 change records found show changes
CVE Modified by CISA-ADP
6/16/2026 11:42:49 PM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2025-12-16T18:01:22.351686Z","id":"CVE-2021-26084","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by Atlassian
6/16/2026 11:42:49 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"Atlassian","product":"Confluence Server","versions":[{"version":"unspecified","lessThan":"6.13.23","versionType":"custom","status":"affected"},{"version":"6.14.0","lessThan":"unspecified","versionType":"custom","status":"affected"},{"version":"unspecified","lessThan":"7.4.11","versionType":"custom","status":"affected"},{"version":"7.5.0","lessThan":"unspecified","versionType":"custom","status":"affected"},{"version":"unspecified","lessThan":"7.11.6","versionType":"custom","status":"affected"},{"version":"7.12.0","lessThan":"unspecified","versionType":"custom","status":"affected"},{"version":"unspecified","lessThan":"7.12.5","versionType":"custom","status":"affected"}]},{"vendor":"Atlassian","product":"Confluence Data Center","versions":[{"version":"unspecified","lessThan":"6.13.23","versionType":"custom","status":"affected"},{"version":"6.14.0","lessThan":"unspecified","versionType":"custom","status":"affected"},{"version":"unspecified","lessThan":"7.4.11","versionType":"custom","status":"affected"},{"version":"7.5.0","lessThan":"unspecified","versionType":"custom","status":"affected"},{"version":"unspecified","lessThan":"7.11.6","versionType":"custom","status":"affected"},{"version":"7.12.0","lessThan":"unspecified","versionType":"custom","status":"affected"},{"version":"unspecified","lessThan":"7.12.5","versionType":"custom","status":"affected"}]}]
|
Modified Analysis by NIST
10/24/2025 9:38:44 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference Type |
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084 Types: US Government Resource
|
CVE Modified by CISA-ADP
10/21/2025 8:17:27 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084
|
CVE Modified by CISA-ADP
10/21/2025 4:18:24 PM
| Action |
Type |
Old Value |
New Value |
| Removed |
Reference |
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084
|
CVE Modified by CISA-ADP
10/21/2025 3:18:56 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084
|
Modified Analysis by NIST
2/10/2025 1:02:37 PM
| Action |
Type |
Old Value |
New Value |
CVE Modified by CISA-ADP
2/04/2025 10:15:12 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CWE |
CWE-917
|
CVE Modified by CVE
11/21/2024 12:55:50 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html
|
| Added |
Reference |
https://jira.atlassian.com/browse/CONFSERVER-67940
|
CVE Modified by Atlassian
5/14/2024 4:35:31 AM
| Action |
Type |
Old Value |
New Value |
CWE Remap by NIST
8/08/2023 10:21:49 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CWE |
CWE-74
|
CWE-917
|
Modified Analysis by NIST
6/10/2022 10:26:16 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CPE Configuration |
OR
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6
*cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11
*cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6
*cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5
|
OR
*cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23
*cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11
*cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6
*cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5
*cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23
*cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11
*cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6
*cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5
|
| Changed |
Reference Type |
http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html No Types Assigned
|
http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html Exploit, Third Party Advisory, VDB Entry
|
CVE Modified by Atlassian
6/08/2022 2:15:08 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html [No Types Assigned]
|
CPE Deprecation Remap by NIST
3/30/2022 9:28:28 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CPE Configuration |
OR
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 from (excluding) 7.11.6
|
OR
*cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 from (excluding) 7.11.6
|
CPE Deprecation Remap by NIST
3/30/2022 9:28:55 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CPE Configuration |
OR
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5
|
OR
*cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5
|
Modified Analysis by NIST
3/25/2022 4:24:06 PM
| Action |
Type |
Old Value |
New Value |
CVE Modified by Atlassian
2/22/2022 11:15:07 PM
| Action |
Type |
Old Value |
New Value |
| Removed |
Reference |
http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html [Exploit, Third Party Advisory, VDB Entry]
|
| Removed |
Reference |
http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html [Exploit, Third Party Advisory, VDB Entry]
|
CPE Deprecation Remap by NIST
12/13/2021 11:04:46 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
CPE Configuration |
OR
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5
|
OR
*cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5
|
Modified Analysis by NIST
9/16/2021 8:37:20 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
Reference Type |
http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html No Types Assigned
|
http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html Exploit, Third Party Advisory, VDB Entry
|
CVE Modified by Atlassian
9/10/2021 3:15:12 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html [No Types Assigned]
|
Modified Analysis by NIST
9/07/2021 10:56:26 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
Reference Type |
http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html Exploit, Third Party Advisory
|
http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
|
CVE Modified by Atlassian
9/06/2021 8:15:07 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
Description |
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an authenticated user, and in some instances an unauthenticated user, to execute arbitrary code on a Confluence Server or Data Center instance. The vulnerable endpoints can be accessed by a non-administrator user or unauthenticated user if ‘Allow people to sign up to create their account’ is enabled. To check whether this is enabled go to COG > User Management > User Signup Options. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
|
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
|
Initial Analysis by NIST
9/01/2021 10:59:59 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CVSS V2 |
NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
|
| Added |
CWE |
NIST CWE-74
|
| Added |
CPE Configuration |
OR
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6
*cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6
*cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5
|
| Changed |
Reference Type |
http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html No Types Assigned
|
http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html Exploit, Third Party Advisory
|
| Changed |
Reference Type |
https://jira.atlassian.com/browse/CONFSERVER-67940 No Types Assigned
|
https://jira.atlassian.com/browse/CONFSERVER-67940 Issue Tracking, Patch, Vendor Advisory
|
CVE Modified by Atlassian
9/01/2021 2:15:08 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html [No Types Assigned]
|
Quick Info
CVE Dictionary Entry: CVE-2021-26084 NVD
Published Date: 08/30/2021 NVD
Last Modified: 06/16/2026
Source: Atlassian
|
