5.4

CVE-2023-45360: mediawiki Cross-site Scripting

CVSS: 5.4v3.1MediumModified
AliasesUBUNTU-CVE-2023-45360DEBIAN-CVE-2023-45360
Published 03-11-2023Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2023-45360 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in mediawiki. EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 50.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.66%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2
DSA-5520-1MGASA-2024-0155

Timeline

  1. 03-11-2023
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

An issue was discovered in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. There is XSS in youhavenewmessagesmanyusers and youhavenewmessages i18n messages. This is related to MediaWiki:Youhavenewmessagesfromusers.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.66%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.09 pp

From 0.57% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.66%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (phabricator.wikimedia.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • mediawiki< 1:1.39.5-1~deb12u1 | < 1:1.39.5-1
Mediawiki1 product
  • mediawikiEOL< 1.35.12 | ≥ 1.39.0, < 1.39.5 | 1.40.0 | 1.40.0:rc0
Ubuntu1 product
  • mediawikiAll versions (No fix recorded)

3 vendors · 3 products

References

6 links