Gnuboard 5.5.4 and 5.5.5 is vulnerable to Insecure Permissions. An attacker can change password of all users without knowing victim's original password.
https://sir.kr/g5_pds/6400
https://gratis-herring-da5.notion.site/Gnuboard-Account-Takeover-version-5-5-4-5-5-5-2f69b0a21be642f58d8b7c72feea343a
https://github.com/gnuboard/gnuboard5/commit/11718eb4c02ffdca5393bedc0300a75e4e7b19f2
Source: Mitre, NVD
Published: 2023-02-20
Updated: 2026-06-17
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N
Severity: High
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.00118