{"id":"CVE-2026-83526","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-83526","generatedAt":"2026-10-28T01:52:27.677Z","title":"The FV Player 8 plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 8.1.7 via the check_mimetype function.","description":"The FV Player 8 plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 8.1.7 via the check_mimetype function. This is due to insufficient file type validation in check_mimetype(), which writes attacker-supplied remote file content to the public uploads directory before any MIME or extension check, combined with a missing capability check on new player creation. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. This requires successfully exploiting a race condition.","published":"2026-10-10T06:16:43.000Z","lastModified":"2026-10-13T13:29:13.000Z","status":"Deferred","sourceIdentifier":"security@wordfence.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-434"],"affected":[],"epss":{"score":0.00626,"percentile":0.49714,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00644,"percentile":0.49387}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-10T06:16:43.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-10-10T06:16:43.340Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://github.com/foliovision/fv-wordpress-flowplayer/releases/tag/8.1.8","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/editor.php#L36","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/controller/frontend.php#L1211","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L105","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L148","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/checker.php#L181","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db-video.php#L855","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1102","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L1173","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/fv-player/trunk/models/db.php#L46","source":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/5c75cb7b-1ebe-411c-8664-848d741e40d4?source=cve","source":"security@wordfence.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-83526","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}