{"schema":"threatline.record/2","record":{"id":"CVE-2026-43621","aliases":[],"summary":"Simple Machines Forum < 2.1.7 Authorization Confusion via Profile::load()","details":"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.","categories":["Unclassified"],"product":"SMF","vendor":"SimpleMachines","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-43621","source_modified_at":"2026-10-01T15:20:01.095Z","fetched_at":"2026-10-27T04:51:10.072820Z","product":"SMF","vendor":"SimpleMachines","versions":[{"status":"affected","version":"0","versionType":"semver","lessThanOrEqual":"2.1.7"},{"status":"unaffected","version":"6f0dc61958aa86a4b436a222f6176812ed5bbb95","versionType":"git"}],"defaultStatus":"affected"}],"fixed_versions":[],"cvss":8.6,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00363,"percentile":0.29914,"score_date":"2026-10-26"},"published_at":"2026-08-26T21:27:52.842Z","modified_at":"2026-10-01T15:20:01.095Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-43621","fetched_at":"2026-10-27T04:51:10.072820Z","source_modified_at":"2026-10-01T15:20:01.095Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-43621","fetched_at":"2026-10-27T04:51:10.072820Z","source_modified_at":"2026-10-26"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/SimpleMachines/SMF/commit/6f0dc61958aa86a4b436a222f6176812ed5bbb95","tags":["patch"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/simple-machines-forum-authorization-confusion-via-profile-load","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-08-27T18:24:15.611131Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-01T15:20:01.095Z","content_hash":"a4b77d295f983834f36b23f36286463a68c30296e235921b8fd5d10fa9cfa26f"}}