Vanilla 2.6.x before 2.6.4 allows remote code execution.
https://srcincite.io/blog/2018/10/02/old-school-pwning-with-new-school-tricks-vanilla-forums-remote-code-execution.html
https://open.vanillaforums.com/discussion/36771/security-update-vanilla-2-6-4
https://github.com/vanilla/vanilla/releases/tag/Vanilla_2.6.4
Source: Mitre, NVD
Published: 2018-11-03
Updated: 2026-06-17
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.05127