Skip to content
CVE PROGRAM SOURCE RECORD8.6 High

CVE-2026-43621

Simple Machines Forum < 2.1.7 Authorization Confusion via Profile::load()

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

SimpleMachines SMF

Default version status: affected

  • 0 to ≤ 2.1.7affected
  • 6f0dc61958aa86a4b436a222f6176812ed5bbb95unaffected
pkg:github/SimpleMachines/SMF

References