CVE-2026-43621
Simple Machines Forum < 2.1.7 Authorization Confusion via Profile::load()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-863 |
| Vendor | simplemachines |
| Product | smf |
| Published | Aug 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
None
Affected Versions
SimpleMachines / SMF
0 ≤ 2.1.7
References
Credits
abdullah0x1337