CVE-2026-83526
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk50th percentile - higher than 50% of all known CVEs
Summary
The FV Player 8 plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to and including 8.1.7. The check_mimetype function lacks proper file type validation, allowing authenticated attackers with subscriber-level access or above to upload files that may be executable, leading to remote code execution. This requires exploiting a race condition.
Risk Assessment
The risk includes remote code execution on the server, potentially leading to full site compromise. However, the attack requires exploiting a race condition.
Recommendation
Update the FV Player 8 plugin to the latest version. Also strengthen file type validation and add capability checks.
Other vulnerabilities in FV Player 8
See all- CVE-2026-95807Medium
The FV Player 8 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'synopsis' Shortcode Attribute in all versions up to and including 8.1.7 due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access and above can inject arbitrary web scripts into pages that execute when a user visits the injected page.
- CVE-2026-42699High
Unauthenticated Cross Site Scripting (XSS) vulnerability in FV Player 8 plugin up to version 8.1.8. Allows unauthorized users to inject malicious scripts into pages viewed by other users.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS