{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43621","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-05-01T18:22:45.640Z","datePublished":"2026-08-26T21:27:52.842Z","dateUpdated":"2026-08-28T16:00:22.892Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-08-28T15:18:27.483Z"},"title":"Simple Machines Forum < 2.1.7 Authorization Confusion via Profile::load()","descriptions":[{"lang":"en","value":"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."}],"tags":["x_open-source"],"datePublic":"2026-07-15T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-863","description":"Incorrect Authorization","type":"CWE"}]}],"affected":[{"defaultStatus":"affected","vendor":"SimpleMachines","product":"SMF","packageURL":"pkg:github/SimpleMachines/SMF","repo":"https://github.com/SimpleMachines/SMF","versions":[{"status":"affected","version":"0","versionType":"semver","lessThanOrEqual":"2.1.7"},{"status":"unaffected","version":"6f0dc61958aa86a4b436a222f6176812ed5bbb95","versionType":"git"}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/SimpleMachines/SMF/commit/6f0dc61958aa86a4b436a222f6176812ed5bbb95","name":"Patch Commit","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/simple-machines-forum-authorization-confusion-via-profile-load","tags":["third-party-advisory"]}],"credits":[{"lang":"en","value":"abdullah0x1337","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"vulncheck"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-27T18:24:15.611131Z","id":"CVE-2026-43621","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-28T16:00:22.892Z"}}]}}