CVE-2026-43621 — Simple Machines Forum < 2.1.7 Authorization Confusion via Profile::load()
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-p…
Published: 2026-08-26 · CVSS: 8.6 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7