8.6

CVE-2025-21612: starcitizentools mediawiki-extensions-tabberneue Cross-site Scripting

CVSS: 8.6v3.1HighDeferred
Published 06-01-2025Last modified 26-08-2025
Open JSON

Vulnerability summary

CVE-2025-21612 is a high (CVSS 8.6) Cross-site Scripting vulnerability in starcitizentools mediawiki-extensions-tabberneue. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 42.1% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
0.50%
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. 06-01-2025
    PublishedVulnerability first disclosed.
  2. 26-08-2025
    Last modifiedVulnerability information updated.

Description

TabberNeue is a MediaWiki extension that allows the wiki to create tabs. Prior to 2.7.2, TabberTransclude.php doesn't escape the user-supplied page name when outputting, so an XSS payload as the page name can be used here. This vulnerability is fixed in 2.7.2.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

0.00 pp

From 0.51% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.50%

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

Starcitizentools1 product

1 vendor · 1 product

References

3 links