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VULNERABILITIES

CVE-2021-31552 Details

Description

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly executed certain rules related to blocking accounts after account creation. Such rules would allow for user accounts to be created while blocking only the IP address used to create an account (and not the user account itself). Such rules could also be used by a nefarious, unprivileged user to catalog and enumerate any number of IP addresses related to these account creations.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://gerrit.wikimedia.org/r/q/I8bae477ad7e4d0190335363ac2decf28e4313da1 CVEIssue TrackingVendor Advisory
https://phabricator.wikimedia.org/T152394 CVEThird Party Advisory
https://gerrit.wikimedia.org/r/q/I8bae477ad7e4d0190335363ac2decf28e4313da1 [email protected]Issue TrackingVendor Advisory
https://phabricator.wikimedia.org/T152394 [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-863Incorrect Authorization[email protected]

Affected Products

ProductVersions
mediawiki mediawiki
<= 1.35.2

CPE

  • cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-31552
NVD Published Date:
Apr 22, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-31552 Details - Not Deferred