Vulnerability in Mozilla Firefox
CVE-2018-18495
WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. This vulnerability affects Firefox < 64.
EPSS: 0.017 (74.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
Affected products
- Mozilla Firefox — versions unspecified
- Canonical Ubuntu_linux — versions 14.04, 16.04, 18.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (Vendor Advisory, Permissions Required, x_refsource_CONFIRM, Issue Tracking)
- security@mozilla.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2018-18495?
- CVE-2018-18495 is a medium-severity vulnerability in Mozilla Firefox, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2019-02-28.
- How severe is CVE-2018-18495?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2018-18495 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.