The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment (shortcode attribute 'align')' parameter in all versions up to, and including, 7.5.55.7212 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 plugin's 'Parse Vimeo and YouTube links' (parse_comments) setting to be enabled by an administrator, which causes the plugin to register do_shortcode on the comment_text filter, allowing attacker-supplied shortcode attributes stored in comments to be rendered unescaped to all subsequent visitors.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 7
https://github.com/foliovision/fv-wordpress-flowplayer/commit/c00ff09bc43826661…
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https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/contro…
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https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/contro…
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https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/models…
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https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/models…
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https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/trunk/models…
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https://www.wordfence.com/threat-intel/vulnerabilities/id/30215025-58d0-48e4-88…
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