CVE-2018-18495

6.5 mediumEPSS 1.9%

Medium (6.5). EPSS 1.9% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.0

6.5 medium

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

EPSS: 1.9% chance of exploitation in the next 30 days; higher than 80% of CVEs (scores of 2026-10-31)
CWE: CWE-732
Published: 2019-02-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

canonical:ubuntu_linux
mozilla:firefox

References

http://www.securityfocus.com/bid/106167
https://bugzilla.mozilla.org/show_bug.cgi?id=1427585
https://usn.ubuntu.com/3844-1/
https://www.mozilla.org/security/advisories/mfsa2018-29/
http://www.securityfocus.com/bid/106167

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