5.8

CVE-2025-62656: the wikimedia foundation mediawiki globalblocking extension Cross-site Scripting

CVSS: 5.8v4.0MediumDeferred
AliasesUBUNTU-CVE-2025-62656
Published 20-10-2025Last modified 20-10-2025
Open JSON

Vulnerability summary

CVE-2025-62656 is a medium (CVSS 5.8) Cross-site Scripting vulnerability in the wikimedia foundation mediawiki globalblocking extension. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-10-2025
    PublishedVulnerability first disclosed.
  2. 20-10-2025
    Last modifiedVulnerability information updated.

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki GlobalBlocking extension allows Stored XSS.This issue affects MediaWiki GlobalBlocking extension: 1.43, 1.44.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

The wikimedia foundation1 product
Ubuntu1 product
  • mediawikiAll versions (No fix recorded)

2 vendors · 2 products

References

3 links