{"id":"CVE-2026-35056","state":"PUBLISHED","title":"XenForo Remote Code Execution via Authenticated Admin","description":"XenForo before 2.3.9 and before 2.2.18 allows remote code execution (RCE) by authenticated, but malicious, admin users. An attacker with admin panel access can execute arbitrary code on the server.","publishedAt":"2026-04-01T00:30:13.996Z","updatedAt":"2026-05-25T23:42:08.349Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["XenForo XenForo"],"affected":[{"vendor":"XenForo","product":"XenForo","defaultStatus":"unaffected","versions":[{"version":"2.3.0","status":"affected","lessThan":"2.3.9","versionType":"semver"},{"version":"0","status":"affected","lessThan":"2.2.18","versionType":"semver"}]}],"references":["https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/","https://www.vulncheck.com/advisories/xenforo-remote-code-execution-via-authenticated-admin"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35056.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35056","state":"PUBLISHED","datePublished":"2026-04-01T00:30:13.996Z","dateUpdated":"2026-05-25T23:42:08.349Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-04-01T00:19:59.194Z"},"containers":{"cna":{"title":"XenForo Remote Code Execution via Authenticated Admin","descriptions":[{"lang":"en","value":"XenForo before 2.3.9 and before 2.2.18 allows remote code execution (RCE) by authenticated, but malicious, admin users. An attacker with admin panel access can execute arbitrary code on the server."}],"affected":[{"vendor":"XenForo","product":"XenForo","defaultStatus":"unaffected","versions":[{"version":"2.3.0","status":"affected","lessThan":"2.3.9","versionType":"semver"},{"version":"0","status":"affected","lessThan":"2.2.18","versionType":"semver"}]}],"references":[{"url":"https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/","name":"XenForo 2.3.9 (inc XFMG) & 2.2.18 Released (Security Fix)","tags":["vendor-advisory","patch"]},{"url":"https://www.vulncheck.com/advisories/xenforo-remote-code-execution-via-authenticated-admin","name":"VulnCheck Advisory: XenForo Remote Code Execution via Authenticated Admin","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.6,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"HIGH","baseScore":7.2,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-05-25T23:42:08.349Z"},"datePublic":"2026-02-05T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:*","versionStartIncluding":"2.3.0","versionEndExcluding":"2.3.9"},{"vulnerable":true,"criteria":"cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:*","versionEndExcluding":"2.2.18"}]}]}],"credits":[{"lang":"en","value":"UwU","type":"finder"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-01T19:04:49.094911Z","id":"CVE-2026-35056","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-01T19:04:59.806Z"}}]}}}