What is CVE-2023-45369?

CVE-2023-45369 is a medium-severity vulnerability in MediaWiki, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 4.3/10. Published 2023-10-09.

How severe is CVE-2023-45369?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in MediaWiki

CVE-2023-45369

An issue was discovered in the PageTriage extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. Usernames of hidden users are exposed.

Published 2023-10-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

MediaWiki — versions 1.40.0

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

phabricator.wikimedia.org/T344359 (Issue Tracking, Vendor Advisory)
gerrit.wikimedia.org/r/c/mediawiki/extensions/PageTriage/+/960676 (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-45369?: CVE-2023-45369 is a medium-severity vulnerability in MediaWiki, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 4.3/10. Published 2023-10-09.
How severe is CVE-2023-45369?: Medium severity. CVSS v3 base score is 4.3 out of 10.