Missing Authorization in Confluence Server - CVE-2021-26085
Published: October 6, 2021 / Updated: March 28, 2022
Vulnerability identifier: #VU57077
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-26085
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to missing authorization in the /s/ endpoint. A remote non-authenticated attacker can send a specially crafted HTTP request to the application and view contents of arbitrary files on the system.
Affected software
Confluence Server
How to mitigate CVE-2021-26085
Install updates from vendor's website.
Confluence Server - addressed in versions 7.4.10, 7.12.3