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CVE-2026-121515— FV Flowplayer Video Player <= 7.5.56.7212 - Unauthenticated Stored Cross-Site Scripting via Comment Content

Quick assessment

Affected
foliovision FV Flowplayer Video Player
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 FV Flowplayer Video Player 在 7.5.56.7212 及更早的所有版本中，由于输入清理和输出转义不足，存在通过 参数触发的存储型跨站脚本（Stored XSS）漏洞。这使得未经身份验证的攻击者能够在页面上注入任意 Web 脚本；当用户访问被注入的页面时，这些脚本将被执行。该漏洞的利用需要启用"Parse Vimeo and YouTube links"（解析 Vimeo 和 YouTube 链接）选项，并且注入的评论必须经过批准，脚本才会对网站访客执行。

CVSS 5.4 · Medium
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I. Basic Information for CVE-2026-121515

Vulnerability Information
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Vulnerability Title
FV Flowplayer Video Player <= 7.5.56.7212 - Unauthenticated Stored Cross-Site Scripting via Comment Content
Source: CVE Program / CVE List V5
Vulnerability Description
The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 7.5.56.7212 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. This requires the 'Parse Vimeo and YouTube links' option to be enabled, and the injected comment must be approved before the script executes for site visitors.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
foliovision FV Flowplayer Video Player 0 ~ 7.5.56.7212 -

II. Public POCs for CVE-2026-121515

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III. Intelligence Information for CVE-2026-121515

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Other References for CVE-2026-121515 (4)

IV. Related Vulnerabilities

Same product: FV Flowplayer Video Player
Same vendor: foliovision
Same weakness: CWE-79