{"id":"CVE-2026-6257","summary":"Vvveb CMS \u003c v1.0.8.2 Remote Code Execution via Media Management","details":"Vvveb CMS v1.0.8.2 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.","modified":"2026-07-16T03:31:16.545307855Z","published":"2026-04-20T19:09:45.927Z","database_specific":{"cwe_ids":["CWE-434"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6257.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6257.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6257"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management"},{"type":"FIX","url":"https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/givanz/vvveb","events":[{"introduced":"8b9db6a408ba35d8ac1dd078823c73f76584d78f"},{"fixed":"6fb8eaa998265e33e8802cbc220d8859dbc144f2"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.0.8.2"},{"last_affected":"1.0.8.2"}]}}],"versions":["1.0.8.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6257.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}