CVE-2018-12370

8.8 highEPSS 1.1%

High (8.8). EPSS 1.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.0

8.8 high

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

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 66% of CVEs (scores of 2026-10-31)
CWE: CWE-352
Published: 2018-10-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

canonical:ubuntu_linux
mozilla:firefox

References

http://www.securitytracker.com/id/1041193
https://bugzilla.mozilla.org/show_bug.cgi?id=1456652
https://security.gentoo.org/glsa/201810-01
https://usn.ubuntu.com/3705-1/
https://www.mozilla.org/security/advisories/mfsa2018-15/

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