CVE-2025-13898
Ultra Skype Button <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'btn_id' Shortcode Attribute
- State
- Published
- Severity
- 6.4 Medium
- Published
- Dec 6, 2025
- Updated
- Apr 8, 2026
- Reserved
- Dec 2, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Ultra Skype Buttonsozan45 |
|
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
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