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TI-2025-33432 Aliases CVE-2025-53487GHSA-mvg5-47qm-mhwf

ApprovedRevs: Stored Cross-Site Scripting (XSS) via unsanitized system messages

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

The ApprovedRevs extension for MediaWiki is vulnerable to stored XSS in multiple locations where system messages are inserted into raw HTML without proper escaping. Attackers can exploit this by injecting JavaScript payloads via the uselang=x-xss language override, which causes crafted message keys to be rendered unescaped. This issue affects Mediawiki - ApprovedRevs extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00198 9th percentileScored 2026-11-07
Fix Fixed Mediawiki - ApprovedRevs extension (Wikimedia Foundation): 1.39.13, 1.42.7, 1.43.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Wikimedia FoundationMediawiki - ApprovedRevs extension1.39.x to before 1.39.13; 1.42.x to before 1.42.7; 1.43.x to before 1.43.21.39.13, 1.42.7, 1.43.2Patch availableCNA
  • Mediawiki - ApprovedRevs extension VendorWikimedia Foundation Affected 1.39.x to before 1.39.13; 1.42.x to before 1.42.7; 1.43.x to before 1.43.2 Fixed in 1.39.13, 1.42.7, 1.43.2 Patch available CNA

Remediation

  • Fix · CNA Mediawiki - ApprovedRevs extension (Wikimedia Foundation) Fixed in 1.39.13, 1.42.7, 1.43.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-53487
  2. 2026-10-03 Alias added: GHSA-mvg5-47qm-mhwf

References

Other 2

  • TI-2025-11006 The compare API module breaks Extension:Lockdown CVSS 4.0CRITICAL 10.0
  • TI-2024-32110 Backticks can allow the usage of not-allowed SQL functions CVSS 4.0HIGH 8.8
  • TI-2026-65500 Unauthenticated SQL injection in UserPageViewTracker via filterusers and ignoreusers parameters CVSS 3.1HIGH 7.5
  • TI-2026-64588 DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion) CVSS 3.1HIGH 7.5
  • TI-2026-42112 SQLi in Cargo extension via year range filter CVSS 4.0MEDIUM 6.9
  • TI-2026-42110 Stored XSS through Cargo's map format CVSS 4.0MEDIUM 6.9
See all 255 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences