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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L3
- https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/20b3c88f-a0df-4814-83b
FAQ
What is CVE-2025-13898?
CVE-2025-13898 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 insu...
How severe is CVE-2025-13898?
CVE-2025-13898 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-13898?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.