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Fencer Vulns
low 3.1

CVE-2020-15005 json

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

published 2020-06-24 6 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2020-15005 , EUVD-2022-5838 , GHSA-xpv7-93cm-4mxv

cvss
3.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist mediawiki/core 1.31.8, 1.33.4, 1.34.2
  • bitnami mediawiki 1.31.8, 1.33.4, 1.34.2
  • mediawiki mediawiki 1.31.8, 1.33.4, 1.34.2
  • mediawiki Debian 14, Debian 13, Debian 12 1:1.31.8-1

debian advisories DEBIAN-CVE-2020-15005

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-15005 updated cvss 3.1

mediawiki: possible leak of private extension images into public cache

  • Red Hat OpenShift Container Platform 3.11 mediawiki Red Hat OpenShift Container Platform 4 mediawiki
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD 2.0 2.6 AV:N/AC:H/Au:N/C:P/I:N/A:N
OSV 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist 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
bitnami mediawiki
<1.31.8
>=1.32.0, <1.33.4
>=1.34.0, <1.34.2
1.31.8
1.33.4
1.34.2

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.