Answer in brief
CVE-2021-26084 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps Atlassian/Confluence Data Center (generic), Atlassian/Confluence Server (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Atlassian/Confluence Data Center (generic), Atlassian/Confluence Server (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Atlassian/Confluence Data Centergeneric | >=unspecified <6.13.23 || >=6.14.0 <unspecified || >=unspecified <7.4.11 || >=7.5.0 <unspecified || >=unspecified <7.11.6 || >=7.12.0 <unspecified || >=unspecified <7.12.5 | 6.13.23, unspecified, 7.4.11, 7.11.6, 7.12.5 |
| Atlassian/Confluence Servergeneric | >=unspecified <6.13.23 || >=6.14.0 <unspecified || >=unspecified <7.4.11 || >=7.5.0 <unspecified || >=unspecified <7.11.6 || >=7.12.0 <unspecified || >=unspecified <7.12.5 | 6.13.23, unspecified, 7.4.11, 7.11.6, 7.12.5 |
Published upstream
Aug 30, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Dec 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordIn 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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-26084 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps Atlassian/Confluence Data Center (generic), Atlassian/Confluence Server (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Atlassian/Confluence Data Center (generic), Atlassian/Confluence Server (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Atlassian/Confluence Data Centergeneric | >=unspecified <6.13.23 || >=6.14.0 <unspecified || >=unspecified <7.4.11 || >=7.5.0 <unspecified || >=unspecified <7.11.6 || >=7.12.0 <unspecified || >=unspecified <7.12.5 | 6.13.23, unspecified, 7.4.11, 7.11.6, 7.12.5 |
| Atlassian/Confluence Servergeneric | >=unspecified <6.13.23 || >=6.14.0 <unspecified || >=unspecified <7.4.11 || >=7.5.0 <unspecified || >=unspecified <7.11.6 || >=7.12.0 <unspecified || >=unspecified <7.12.5 | 6.13.23, unspecified, 7.4.11, 7.11.6, 7.12.5 |
Published upstream
Aug 30, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Dec 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordIn 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.
Quoted source text, attributed separately from HOL analysis.