CVE-2018-12358
Service workers can use redirection to avoid the tainting of cross-origin resources in some instances, allowing a malicious site to read responses which are supposed to be opaque.
Does this matter?
Lower severity and a low EPSS score (1.27%). Track it; it rarely justifies an emergency change on its own.
Description
Service workers can use redirection to avoid the tainting of cross-origin resources in some instances, allowing a malicious site to read responses which are supposed to be opaque. This vulnerability affects Firefox < 61.
- CVSS 3.0
- 4.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- EPSS
- 1.27% probability · 70th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- mozilla/firefox · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS 1.3% 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.securitytracker.com/id/1041193Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1467852Issue Tracking, Permissions Required
- https://security.gentoo.org/glsa/201810-01Mitigation, Third Party Advisory
- https://usn.ubuntu.com/3705-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-15/Vendor Advisory
- http://www.securitytracker.com/id/1041193Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1467852Issue Tracking, Permissions Required
- https://security.gentoo.org/glsa/201810-01Mitigation, Third Party Advisory
- https://usn.ubuntu.com/3705-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-15/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.