CVE-2018-12369

Mozilla: WebExtension security permission checks bypassed by embedded experiments

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Severity

Moderate

Red Hat Product Security

9.8

CVSS 3.0

Review impact separately from score.

Published · June 26, 2018

Updated · November 26, 2025

Description

WebExtensions bundled with embedded experiments were not correctly checked for proper authorization. This allowed a malicious WebExtension to gain full browser permissions. This vulnerability affects Firefox ESR < 60.1 and Firefox < 61.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-829 · Inclusion of Functionality from Untrusted Control Sphere