CVE-2025-13898
Ultra Skype Button <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'btn_id' Shortcode Attribute
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | sozan45 |
| Product | ultra skype button |
| Published | Dec 6, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
sozan45 / Ultra Skype Button
0 ≤ 1.0
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/20b3c88f-a0df-4814-83b6-27440c5ad38e?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L39 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L39 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L44 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L44
Credits
Muhammad Yudha - DJ