CVE-2018-12370

HIGH 8.8CVE-2018-12370 · Published 18/10/2018 · updated 17/06/2026

In short

CVE-2018-12370 is a HIGH (CVSS 8.8) vulnerability affecting firefox (mozilla).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 66.4% of all vulnerabilities.
Fix: update to 61.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 61.0`	`61.0`

Description

In Reader View SameSite cookie protections are not checked on exiting. This allows for a payload to be triggered when Reader View is exited if loaded by a malicious site while Reader mode is active, bypassing CSRF protections. This vulnerability affects Firefox < 61.

References

securitytracker.com/id/1041193 · Third Party Advisory
bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
security.gentoo.org/glsa/201810-01 · Third Party Advisory
usn.ubuntu.com/3705-1 · Third Party Advisory
mozilla.org/security/advisories/mfsa2018-15 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 61.0

61.0

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