VULNERABILITY INTELLIGENCE
CVE-2026-43621
CVSS score8.1 HIGH
EPSS probability0.36%
CISA KEVNot currently listed
Published2026-08-26
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Description
Simple Machines Forum (SMF) through 2.1.7, fixed in commit 6f0dc61, contains an authorization state-confusion vulnerability in the profile loader that allows authenticated low-privileged users to gain administrator access by supplying multiple values for the user parameter. Attackers can exploit the mismatch between Profile::$member and User::$me->is_owner during sequential profile loading to be treated as the owner of an administrator profile, enabling unauthorized password changes and full account takeover.
Weakness classification
- disclosure@vulncheck.com: CWE-863