CVE-2018-12364

critical
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
9.5

Description

NPAPI plugins, such as Adobe Flash, can send non-simple cross-origin requests, bypassing CORS by making a same-origin POST that does a 307 redirect to the target site. This allows for a malicious site to engage in cross-site request forgery (CSRF) attacks. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and 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-2018-12364

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-12364.html

vendor Authored 2026-05-27

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

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201807-4

OS impact

OSVersionStatusFixed in
arch archfixed52.9.1-1
suse slesaffected
debian debiansidfixed61.0-1
debian debianbookwormfixed52.9.0esr-1
debian debianbullseyefixed52.9.0esr-1
debian debianforkyfixed52.9.0esr-1
debian debiantrixiefixed52.9.0esr-1

References

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