CVE-2021-26085

Known Exploited Public Exploit

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 94.33% Top 5%
KEV Since 
Vendor Advisory atlassian.com
Affected: Atlassian Confluence Server
Affected: Atlassian Confluence Data Center
Published at:
Updated at:

References

Link Tags
https://jira.atlassian.com/browse/CONFSERVER-67893 issue tracking vendor advisory
http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html exploit vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-26085?
CVE-2021-26085 has been scored as a medium severity vulnerability.
How to fix CVE-2021-26085?
To fix CVE-2021-26085, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-26085 being actively exploited in the wild?
It is confirmed that CVE-2021-26085 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-26085?
CVE-2021-26085 affects Atlassian Confluence Server, Atlassian Confluence Data Center.
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