Input validation error in MediaWiki - CVE-2021-31556
Published: April 26, 2021
Vulnerability identifier: #VU52580
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-31556
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: MediaWiki.org
Affected software:
MediaWiki
MediaWiki
Detailed vulnerability description
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.
How to mitigate CVE-2021-31556
Install updates from vendor's website.