Critical severity9.8CISA KEVNVD Advisory· Published Aug 30, 2021· Updated Jun 17, 2026
CVE-2021-26084
CVE-2021-26084
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*range: <6.13.23
- (no CPE)range: <6.13.23, >=6.14.0 <7.4.11, >=7.5.0 <7.11.6, >=7.12.0 <7.12.5
- (no CPE)range: unspecified
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*range: <6.13.23
- (no CPE)range: <6.13.23, >=6.14.0 <7.4.11, >=7.5.0 <7.11.6, >=7.12.0 <7.12.5
- (no CPE)range: unspecified
Patches
Vulnerability mechanics
References
3- jira.atlassian.com/browse/CONFSERVER-67940nvdIssue TrackingPatchVendor Advisory
- packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.htmlnvdExploitThird Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
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