Improper access control in MediaWiki - CVE-2021-30158

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Main Vulnerability Database Vulnerabilities #VU52028

Improper access control in MediaWiki - CVE-2021-30158

Published: April 12, 2021


Vulnerability identifier: #VU52028
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30158
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions, related to usage of Special:ResetTokens by blocked users. A remote attacker can reset access token and gain unauthorized access to the application.


Affected software

MediaWiki
Gentoo Linux
mediawiki (Debian package)

How to mitigate CVE-2021-30158

Install updates from vendor's website.

MediaWiki - addressed in versions 1.31.13, 1.35.2
mediawiki (Debian package) - update to 1:1.31.14-1~deb10u1

External References

Related Security Bulletins