CVE-2021-26084: Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability
First published: Mon Aug 30 2021(Updated: )
Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.
Credit: security@atlassian.com security@atlassian.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Atlassian Confluence Data Center | <6.13.23 | |
| Atlassian Confluence Data Center | >=6.14.0<7.4.11 | |
| Atlassian Confluence Data Center | >=7.5.0<7.11.6 | |
| Atlassian Confluence Data Center | >=7.12.0<7.12.5 | |
| Atlassian Confluence Server | <6.13.23 | |
| Atlassian Confluence Server | >=6.14.0<7.4.11 | |
| Atlassian Confluence Server | >=7.5.0<7.11.6 | |
| Atlassian Confluence Server | >=7.12.0<7.12.5 | |
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Reference Links
Frequently Asked Questions
What is CVE-2021-26084?
CVE-2021-26084 is a vulnerability in Atlassian Confluence Server and Data Center that allows an unauthenticated attacker to execute arbitrary code.
How severe is CVE-2021-26084?
CVE-2021-26084 has a severity score of 9.8, which is considered critical.
Which versions of Confluence Server and Data Center are affected by CVE-2021-26084?
Versions before 6.13.23 and from 6.14.0 to 7.4.11 of Confluence Server and Data Center are affected by CVE-2021-26084.
How can an attacker exploit CVE-2021-26084?
An attacker can exploit CVE-2021-26084 by injecting malicious Object-Graph Navigation Language (OGNL) code.
Is there a fix for CVE-2021-26084?
Yes, updating Confluence Server and Data Center to version 7.4.11 or later will fix the vulnerability.
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- canonical/atlassian confluence server and data center
- canonical/atlassian confluence data center
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- version/atlassian confluence data center/7.5.0
- version/atlassian confluence data center/7.12.0
- canonical/atlassian confluence server
- version/atlassian confluence server/6.14.0
- version/atlassian confluence server/7.5.0
- version/atlassian confluence server/7.12.0