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Medium

img_auth.php may leak private extension images into the public cache

  • Disclosed: 24.05.2022
  • Updated: 11.10.2026 10:22

In MediaWiki before 1.31.8, 1.32.x and 1.33.x before 1.33.4, and 1.34.x before 1.34.2, private wikis behind a caching server using the img_auth.php image authorization security feature may have had their files cached publicly, so any unauthorized user could view them. This occurs because Cache-Control and Vary headers were mishandled.

Affected software

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PlatformPackageVulnerable versionsFixed in
Composer package mediawiki/core < 1.31.8, >= 1.32.0, < 1.33.4, >= 1.34.0, < 1.34.2 1.31.8, 1.33.4, 1.34.2

References

CVSS score -
Weakness (CWE)
CWE-200
Platform
Composer
Package
mediawiki/core
Disclosed
24.05.2022
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-xpv7-93cm-4mxv - CC BY 4.0

Vulnerability history: mediawiki/core

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (28) in the archive
Total entries
28
First → latest
05.2022 10.2023
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 2
  • High 6
  • Medium 20

Disclosures per year

Severity:
  1. MediaWiki Denial of Service vulnerability
    High · 7.5 CVE-2023-45363 < 1.35.12, >= 1.36.0, < 1.39.5, >= 1.40.0, < 1.40.1 1.35.12, 1.39.5, 1.40.1
  2. X-Forwarded-For header allows brute-forcing autoblocked IP addresses
    Critical · 9.8 CVE-2023-29141 >= 1.39.0, < 1.39.3, >= 1.38.0, < 1.38.6, < 1.35.10 1.39.3, 1.38.6, 1.35.10
  3. OATHAuth extension in MediaWiki is not implementing rate limit
    High · 7.5 CVE-2020-25827 >= 1.31.0, < 1.31.9, >= 1.32.0, < 1.34.3 1.31.9, 1.34.3
  4. img_auth.php may leak private extension images into the public cache this entry
    Medium CVE-2020-15005 < 1.31.8, >= 1.32.0, < 1.33.4, >= 1.34.0, < 1.34.2 1.31.8, 1.33.4, 1.34.2
  5. Wikimedia information leak vulnerability
    High · 7.5 CVE-2019-12474 >= 1.27.0, < 1.27.6, >= 1.30.0, < 1.30.2, >= 1.31.0, < 1.31.2, >= 1.32.0, < 1.32.2 1.27.6, 1.30.2, 1.31.2, 1.32.2
  6. Wikimedia Potential DOS due to slow WatchedItemStore::countVisitingWatchersMultiple
    High · 7.5 CVE-2019-12473 >= 1.27.0, < 1.27.6, >= 1.30.0, < 1.30.2, >= 1.31.0, < 1.31.2, >= 1.32.0, < 1.32.2 1.27.6, 1.30.2, 1.31.2, 1.32.2
  7. MediaWiki Incorrect Access Control vulnerability
    High · 7.5 CVE-2019-12472 >= 1.18.0, < 1.27.6, >= 1.30.0, < 1.30.2, >= 1.31.0, < 1.31.2, >= 1.32.0, < 1.32.2 1.27.6, 1.30.2, 1.31.2, 1.32.2
  8. Wikimedia MediaWiki allows CSRF
    High · 8.8 CVE-2019-12466 >= 1.27.0, < 1.27.6, >= 1.30.0, < 1.30.2, >= 1.31.0, < 1.31.2, >= 1.32.0, < 1.32.2 1.27.6, 1.30.2, 1.31.2, 1.32.2
  9. Wikimedia MediaWiki Incorrect Access Control vulnerability
    Critical · 9.8 CVE-2019-12468 >= 1.27.0, < 1.27.6, >= 1.30.0, < 1.30.2, >= 1.31.0, < 1.31.2, >= 1.32.0, < 1.32.2 1.27.6, 1.30.2, 1.31.2, 1.32.2

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