CVE-2018-18495
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.
Does this matter?
Lower severity and a low EPSS score (1.93%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 1.93% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-732
- Affected
- mozilla/firefox · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS 1.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/106167Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1427585Issue Tracking, Permissions Required, Vendor Advisory
- https://usn.ubuntu.com/3844-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-29/Vendor Advisory
- http://www.securityfocus.com/bid/106167Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1427585Issue Tracking, Permissions Required, Vendor Advisory
- https://usn.ubuntu.com/3844-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-29/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.