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CVE-2021-38492

CVE-2021-38492

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

When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.

CVSS 6.5 · Medium · EPSS 1.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • firefox

    Versions
    • ≥ unspecified, < 92: Affected (custom)

    Update to 92

  • thunderbird

    Versions
    • ≥ unspecified, < 91.1: Affected (custom)
    • ≥ unspecified, < 78.14: Affected (custom)

    Update to 78.14

  • firefox esr

    Versions
    • ≥ unspecified, < 78.14: Affected (custom)
    • ≥ unspecified, < 91.1: Affected (custom)

    Update to 78.14

  • mozjs52 Ubuntu:18.04:LTS

    Versions
    • 52.3.1-0ubuntu3
    • 52.3.1-7fakesync1
    • 52.8.1-0ubuntu0.18.04.1
    • 52.9.1-0ubuntu0.18.04.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mozjs38 Ubuntu:18.04:LTS

    Versions
    • 38.8.0~repack1-0ubuntu1
    • 38.8.0~repack1-0ubuntu3
    • 38.8.0~repack1-0ubuntu4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mozjs68 Ubuntu:20.04:LTS

    Versions
    • 68.5.0-1~fakesync
    • 68.5.0-2~fakesync
    • 68.6.0-1
    • 68.6.0-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mozjs52 Ubuntu:20.04:LTS

    Versions
    • 52.9.1-1build1
    • 52.9.1-1ubuntu3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mozjs78 Ubuntu:22.04:LTS

    Versions
    • 78.13.0-1
    • 78.15.0-2
    • 78.15.0-4ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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