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CVE-2020-4049

CVE-2020-4049 · Authenticated self-XSS via theme uploads in WordPress

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

In affected versions of WordPress, when uploading themes, the name of the theme folder can be crafted in a way that could lead to JavaScript execution in /wp-admin on the themes page. This does require an admin to upload the theme, and is low severity self-XSS. 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 2.4 · Low · EPSS 2.5% · 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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