AUGUST 4, 2026
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Case File

CVE-2021-31552

MEDIUM · CVSS 5.4 EPSS 0.58%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-04-22 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.4. See the original NVD description below for full technical details.

CVE
CVE-2021-31552
Severity
MEDIUM
CVSS
5.4
EPSS
0.58%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)