Mstoic Shortcodes <= 2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'start' Shortcode Attribute
Vulnerability Description
The Mstoic Shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'start' parameter of the ms_youtube_embeds shortcode in all versions up to, and including, 2.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- zakaria
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6e83c039-9b15-4e0c-8b07-3b906938c138?source=cve
- https://plugins.trac.wordpress.org/browser/mstoic-shortcodes/trunk/functions/shortcodes/youtube_embeds.php#L117
- https://plugins.trac.wordpress.org/browser/mstoic-shortcodes/tags/2.0/functions/shortcodes/youtube_embeds.php#L117
Affected Vendor
mstoic
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