Exposure of Resource to Wrong Sphere in MediaWiki - CVE-2021-31547

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Main Vulnerability Database Vulnerabilities #VU52560

Exposure of Resource to Wrong Sphere in MediaWiki - CVE-2021-31547

Published: April 26, 2021


Vulnerability identifier: #VU52560
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-31547
CWE-ID:
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: MediaWiki.org
Affected software:
MediaWiki

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to exposure of resource to wrong sphere issue in the AbuseFilter extension. A remote authenticated attacker can reveal suppressed edits and usernames through the iteration of crafted AbuseFilter rules.


How to mitigate CVE-2021-31547

Install updates from vendor's website.

Sources