CVE-2018-12370

critical

Published — · Modified —

CVSS v3

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CVSS v2

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VIR risk

9.5

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.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-12370

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-12370.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201806-14

OS impact

OS	Version	Status	Fixed in
arch		fixed	`61.0-1`
sles		affected
debian	sid	fixed	`61.0-1`

References

https://security.archlinux.org/ASA-201806-14
https://www.suse.com/security/cve/CVE-2018-12370.html
https://security-tracker.debian.org/tracker/CVE-2018-12370

Verify integrity in audit chain (admin only). AS-IS.