Ultra Skype Button <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'btn_id' Shortcode Attribute
Vulnerability Description
The Ultra Skype Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'btn_id' parameter of the [ultra_skype] shortcode in all versions up to, and including, 1.0 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.
Am I Vulnerable?
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Muhammad Yudha - DJ
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/20b3c88f-a0df-4814-83b6-27440c5ad38e?source=cve
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L39
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L39
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L44
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L44
Affected Vendor
sozan45
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