Exposure of Resource to Wrong Sphere in MediaWiki - CVE-2021-31552
Published: April 26, 2021
Vulnerability identifier: #VU52575
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-2021-31552
CWE-ID:
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 incorrectly executes certain rules related to blocking accounts after account creation in the AbuseFilter extension. A remote authenticated attacker can create user accounts or enumerate any number of IP addresses related to these account creations.
Affected software
MediaWiki
How to mitigate CVE-2021-31552
Install updates from vendor's website.
MediaWiki - addressed in versions 1.31.13, 1.35.2