What is CVE-2021-31548?

CVE-2021-31548 is a medium-severity vulnerability in MediaWiki, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-04-22.

How severe is CVE-2021-31548?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in MediaWiki

CVE-2021-31548

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.

Vulnerability class: Broken Access Control

EPSS: 0.007 (49.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Mediawiki
N/a — versions n/a

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-31548?: CVE-2021-31548 is a medium-severity vulnerability in MediaWiki, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-04-22.
How severe is CVE-2021-31548?: Medium severity. CVSS v3 base score is 6.5 out of 10.