Input validation error in MediaWiki - CVE-2021-31555
Published: April 26, 2021
Vulnerability identifier: #VU52586
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31555
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 target system.
The vulnerability exists due to the affected software does not validate the oarc_version (aka oauth_registered_consumer.oarc_version) parameter's length in the Oauth extension.
Affected software
MediaWiki
How to mitigate CVE-2021-31555
Install updates from vendor's website.
MediaWiki - addressed in versions 1.31.13, 1.35.2