{"id":"CVE-2026-6257","state":"PUBLISHED","title":"Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management","description":"Vvveb CMS before 1.0.8.2 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions .php or .htaccess. Attackers can exploit this logic flaw by first uploading a text file and renaming it to .htaccess to inject Apache directives that register PHP-executable MIME types, then uploading another file and renaming it to .php to execute arbitrary operating system commands as the www-data user.","publishedAt":"2026-04-20T19:09:45.927Z","updatedAt":"2026-10-29T21:16:17.889Z","severity":{"score":9.2,"label":"Critical","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:H/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["Vvveb Vvveb CMS"],"affected":[{"vendor":"Vvveb","product":"Vvveb CMS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.0.8.2","versionType":"custom"},{"version":"1.0.8.2","status":"unaffected","versionType":"custom"}]}],"references":["https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2","https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management"],"weaknesses":["CWE-434"],"ingestedAt":"2026-10-29T23:12:04.845Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6257.json","commit":"dc7676b3f67d6707e4927968546e7e0125ff7ec7","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6257","state":"PUBLISHED","datePublished":"2026-04-20T19:09:45.927Z","dateUpdated":"2026-10-29T21:16:17.889Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-04-13T21:34:23.065Z"},"containers":{"cna":{"title":"Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management","descriptions":[{"lang":"en","value":"Vvveb CMS before 1.0.8.2 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions .php or .htaccess. Attackers can exploit this logic flaw by first uploading a text file and renaming it to .htaccess to inject Apache directives that register PHP-executable MIME types, then uploading another file and renaming it to .php to execute arbitrary operating system commands as the www-data user."}],"affected":[{"vendor":"Vvveb","product":"Vvveb CMS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.0.8.2","versionType":"custom"},{"version":"1.0.8.2","status":"unaffected","versionType":"custom"}]}],"references":[{"url":"https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2","name":"Patch Commit","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management","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":"HIGH","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":"CRITICAL","baseScore":9.2,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"CRITICAL","baseScore":9.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-434","lang":"en","description":"CWE-434 Unrestricted Upload of File with Dangerous Type","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-29T21:16:17.889Z"},"datePublic":"2026-04-20T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vvveb:vvveb:*:*:*:*:*:*:*:*","versionEndExcluding":"1.0.8.2"}]}]}],"source":{"discovery":"EXTERNAL"},"credits":[{"lang":"en","value":"Mohammed EL OUARDANI","type":"finder"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-21T18:05:35.427142Z","id":"CVE-2026-6257","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":"2026-04-21T19:50:26.897Z"}}]}}}