CVE-2020-12424

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-09 · updated 2026-06-17
Weakness: CWE-276

Description

When constructing a permission prompt for WebRTC, a URI was supplied from the content process. This URI was untrusted, and could have been the URI of an origin that was previously granted permission; bypassing the prompt. This vulnerability affects Firefox < 78.

Affected products

Mozilla Firefox: before 78.0 — fixed in 78.0
openSUSE Leap: 15.1, 15.2

How to fix

Upgrade to a fixed version: Mozilla Firefox 78.0. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1562600
https://security.gentoo.org/glsa/202007-10
https://www.mozilla.org/security/advisories/mfsa2020-24/
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1562600
https://security.gentoo.org/glsa/202007-10
https://www.mozilla.org/security/advisories/mfsa2020-24/

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