Input validation error in MediaWiki - CVE-2020-26121
Published: September 27, 2020 / Updated: October 6, 2020
Vulnerability identifier: #VU47351
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-26121
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the system.
The vulnerability exists due to a mishandled distinction between an upload restriction and a create restriction in the FileImporter extension. A remote attacker can force a wiki to have a page with a disallowed title.
Affected software
MediaWiki
How to mitigate CVE-2020-26121
Install updates from vendor's website.
MediaWiki - update to 1.34.4