Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File
Confluence Server and Data Center before 7.4.10, and 7.5.0 through 7.12.2, are affected. Fixed in 7.4.10, 7.12.3, and 7.13.0.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 7.4.10, 7.12.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Atlassian Confluence Server is affected, allowing remote attackers without logging in to read restricted files on the server. This could expose sensitive information stored on the affected system.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Atlassian Confluence Server
From unspecified · fixed in 7.4.10; From 7.5.0 · fixed in unspecified; From unspecified · fixed in 7.12.3
- Atlassian Confluence Data Center
From unspecified · fixed in 7.4.10; From 7.5.0 · fixed in unspecified; From unspecified · fixed in 7.12.3
References 2
jira.atlassian.com
packetstormsecurity.com
Questions about CVE-2021-26085
What does this mean?
The flaw is an arbitrary file read in the /s/ endpoint that needs no prior login, letting remote attackers view restricted resources.Source: jira.atlassian.com
Am I affected, and how do I check?
Confluence Server and Confluence Data Center versions before 7.4.10, and versions from 7.5.0 up to before 7.12.3, are affected. Compare the installed version number against these ranges.Source: jira.atlassian.com
What should I do about it?
Upgrade to 7.4.10, 7.12.3, or 7.13.0, depending on which release line you run.Source: jira.atlassian.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-03-28, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data