Auth bypass in Mozilla Firefox

CVE-2018-12369

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.

Vulnerability class: Broken Access Control

EPSS: 0.025 (83.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2018-12369?
CVE-2018-12369 is a critical-severity vulnerability in Mozilla Firefox, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2018-10-18.
How severe is CVE-2018-12369?
Critical severity. CVSS v3 base score is 9.8 out of 10.