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CVE-2020-4046

CVE-2020-4046 · Authenticated XSS through embed block in WordPress

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

In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).

CVSS 5.4 · Medium · EPSS 2.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • wordpress-develop

    Versions
    • >= 5.4.0, < 5.4.2: Affected
    • >= 5.3.0, < 5.3.4: Affected
    • >= 5.2.0, < 5.2.7: Affected
    • >= 5.1.0, < 5.1.6: Affected
    • >= 5.0.0, < 5.0.10: Affected
    • >= 4.9.0, < 4.9.15: Affected
    • >= 4.8.0, < 4.8.14: Affected
    • >= 4.7.0, < 4.7.18: Affected
    • >= 4.6.0, < 4.6.19: Affected
    • >= 4.5.0, < 4.5.22: Affected
    • >= 4.4.0, < 4.4.23: Affected
    • >= 4.3.0, < 4.3.24: Affected
    • >= 4.2.0, < 4.2.28: Affected
    • >= 4.1.0, < 4.1.31: Affected
    • >= 4.0.0, < 4.0.31: Affected
    • >= 3.9.0, < 3.9.32: Affected
    • >= 3.8.0, < 3.8.34: Affected
    • >= 3.7.0, < 3.7.34: Affected

    No fix published

  • wordpress Debian:12

    Affected ranges
    • ECOSYSTEM: < 5.4.2+dfsg1-1

    Update to 5.4.2+dfsg1-1

  • wordpress Debian:13

    Affected ranges
    • ECOSYSTEM: < 5.4.2+dfsg1-1

    Update to 5.4.2+dfsg1-1

  • wordpress Debian:14

    Affected ranges
    • ECOSYSTEM: < 5.4.2+dfsg1-1

    Update to 5.4.2+dfsg1-1

  • wordpress Ubuntu:16.04:LTS

    Versions
    • 4.3+dfsg-1
    • 4.3.1+dfsg-1
    • 4.4+dfsg-1
    • 4.4.1+dfsg-1
    • 4.4.2+dfsg-1
    • 4.4.2+dfsg-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wordpress Ubuntu:18.04:LTS

    Versions
    • 4.8.2+dfsg-2
    • 4.8.3+dfsg-1
    • 4.9.1+dfsg-1
    • 4.9.2+dfsg-1
    • 4.9.4+dfsg-1
    • 4.9.5+dfsg1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wordpress Ubuntu:20.04:LTS

    Versions
    • 5.2.2+dfsg1-1
    • 5.2.4+dfsg1-1
    • 5.3.2+dfsg1-1
    • 5.3.2+dfsg1-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wordpress Ubuntu:22.04:LTS

    Versions
    • 5.7.1+dfsg1-2ubuntu1
    • 5.8.1+dfsg1-2ubuntu1
    • 5.8.2+dfsg1-1ubuntu1
    • 5.8.3+dfsg1-1ubuntu1
    • 5.8.3+dfsg1-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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