CVE-2026-43621
8.6
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| SimpleMachines | SMF | 0 <= 2.1.7 | affected |
| SimpleMachines | SMF | 6f0dc61958aa86a4b436a222f6176812ed5bbb95 | unaffected |
Weaknesses
- CWE-863: Incorrect Authorization
References
- https://github.com/SimpleMachines/SMF/commit/6f0dc61958aa86a4b436a222f6176812ed5bbb95
- https://www.vulncheck.com/advisories/simple-machines-forum-authorization-confusion-via-profile-load
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