CVE-2023-4520mediumCWE-79

CVE-2023-4520: medium-severity vulnerability in foliovision FV Flowplayer Video Player

FV Flowplayer Video Player <= 7.5.37.7212 - Insufficient Input Validation to Unauthenticated Stored Cross-Site Scripting and Arbitrary Usermeta Update

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.4epss 0.6%
The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘_fv_player_user_video’ parameter saved via the 'save' function hooked via init, and the plugin is also vulnerable to Arbitrary Usermeta Update via the 'save' function in versions up to, and including, 7.5.37.7212 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, and makes it possible to update the user metas arbitrarily, but the meta value can only be a string.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Affected products
foliovision · FV Flowplayer Video Player
Related CVEs — foliovision FV Flowplayer Video Player

In the same product, most dangerous first.

CVE-2026-86461HIGHFV Flowplayer Video Player <= 7.5.54.7212 - Authenticated (Subscriber+) Arbitrary File Upload via 'video_url' ParameterEPSS 0.7%CVE-2024-6338HIGHFV Player <= 7.5.46.7212 - Authenticated (Subscriber+) SQL Injection via exclude ParameterEPSS 0.5%CVE-2024-5020MEDIUMMultiple Plugins <= (Various Versions) - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via FancyBox JavaScript LibraryEPSS 0.4%CVE-2026-109984MEDIUMFV Flowplayer Video Player <= 7.5.55.7212 - Unauthenticated Stored Cross-Site Scripting via 'ad' Shortcode Attribute in CommentsEPSS 0.4%CVE-2026-12135MEDIUMFV Flowplayer Video Player <= 7.5.51.7212 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'video_player' ShortcodeEPSS 0.3%CVE-2026-110001MEDIUMFV Flowplayer Video Player <= 7.5.55.7212 - Unauthenticated Stored Cross-Site Scripting via 'align' Shortcode AttributeEPSS 0.3%