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CVE Record

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...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This MediaWiki flaw could let files from a private wiki become publicly cached when image authorization was used behind a caching server. The main risk is unintended disclosure of private attachments or images, not server takeover. Exposure depends on a specific deployment pattern.

Executive priority

Prioritize if private wikis hold sensitive documents or images and sit behind caching infrastructure. Treat as a confidentiality incident risk until versions and cache state are verified.

Technical view

MediaWiki mishandled Cache-Control and Vary headers for img_auth.php before 1.31.8, 1.33.4, and 1.34.2. Private wikis using that authorization path behind a caching layer may have served protected files into a public cache, allowing unauthorized viewing.

Likely exposure

Most likely exposed are private MediaWiki deployments using img_auth.php behind a shared cache, reverse proxy, CDN, or distribution-packaged MediaWiki older than the fixed releases.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. Abuse would depend on protected files being cached publicly and reachable by unauthorized users.

Researcher notes

The affected product data in the CVE bundle is incomplete, but the description and release references identify MediaWiki fixed versions. No CVSS, CWE, or exploit evidence is provided in the bundle.

Mitigation direction

  • Upgrade MediaWiki to 1.31.8, 1.33.4, 1.34.2, or later supported releases.
  • Apply Debian, Fedora, or other vendor MediaWiki security updates where packages are used.
  • Review Wikimedia and distribution advisories for deployment-specific guidance.
  • Purge shared caches that may contain protected wiki files.
  • Review cache behavior for private file routes using img_auth.php.

Validation and detection

  • Inventory MediaWiki versions across private wiki deployments.
  • Confirm whether img_auth.php is enabled for private file access.
  • Identify reverse proxies, CDNs, or caching servers in front of private wikis.
  • Check protected file responses for correct Cache-Control and Vary behavior.
  • Review cache and web logs for unauthorized protected file access.
Prepared
Confidence
high
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2020-15005 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
9Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.