Auth bypass in Mozilla Firefox
CVE-2018-5135
WebExtensions can bypass normal restrictions in some circumstances and use "browser.tabs.executeScript" to inject scripts into contexts where this should not be allowed, such as pages from other WebExtensions or unprivileged "about:" pages. This vulnerability affects Firefox < 59.
Vulnerability class: Broken Access Control
EPSS: 0.015 (72.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Mozilla Firefox — versions unspecified
Weakness classification (CWE)
References
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- security@mozilla.org (Permissions Required, x_refsource_CONFIRM)
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
- security@mozilla.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-5135?
- CVE-2018-5135 is a high-severity vulnerability in Mozilla Firefox, classified under Missing Authorization. CVSS score: 7.5/10. Published 2018-06-11.
- How severe is CVE-2018-5135?
- High severity. CVSS v3 base score is 7.5 out of 10.