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CVE-2021-30159

CVE-2021-30159

This page contains facts from public vulnerability sources. Check the original advisory before updating.

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Users can bypass intended restrictions on deleting pages in certain "fast double move" situations. MovePage::isValidMoveTarget() uses FOR UPDATE, but it's only called if Title::getArticleID() returns non-zero with no special flags. Next, MovePage::moveToInternal() will delete the page if getArticleID(READ_LATEST) is non-zero. Therefore, if the page is missing in the replica DB, isValidMove() will return true, and then moveToInternal() will unconditionally delete the page if it can be found in the master.

CVSS 4.3 · Medium · EPSS 1.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • mediawiki Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:1.35.2-1

    Update to 1:1.35.2-1

  • mediawiki Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:1.35.2-1

    Update to 1:1.35.2-1

  • mediawiki Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:1.35.2-1

    Update to 1:1.35.2-1

  • mediawiki Ubuntu:Pro:20.04:LTS

    Versions
    • 1:1.31.2-1ubuntu1
    • 1:1.31.5-1
    • 1:1.31.5-1ubuntu1
    • 1:1.31.5-2
    • 1:1.31.5-3
    • 1:1.31.5-3ubuntu1
    • 1:1.31.6-1
    • 1:1.31.7-1
    • 1:1.31.7-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mediawiki Ubuntu:Pro:22.04:LTS

    Versions
    • 1:1.35.3-1
    • 1:1.35.4-1
    • 1:1.35.5-1
    • 1:1.35.5-1ubuntu1
    • 1:1.35.5-1ubuntu2
    • 1:1.35.5-1ubuntu3
    • 1:1.35.6-1
    • 1:1.35.6-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mediawiki Ubuntu:Pro:24.04:LTS

    Versions
    • 1:1.39.4-2
    • 1:1.39.5-1
    • 1:1.39.6-1
    • 1:1.39.7-1
    • 1:1.39.7-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mediawiki Ubuntu:25.10

    Versions
    • 1:1.43.1+dfsg-1
    • 1:1.43.1+dfsg-2
    • 1:1.43.3+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mediawiki Ubuntu:26.10

    Versions
    • 1:1.43.8+dfsg-2
    • 1:1.43.9+dfsg-1
    • 1:1.43.9+dfsg-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mediawiki Ubuntu:26.04:LTS

    Versions
    • 1:1.43.3+dfsg-1
    • 1:1.43.5+dfsg-1
    • 1:1.43.6+dfsg-2
    • 1:1.43.8+dfsg-1
    • 1:1.43.8+dfsg-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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