{"id":"CVE-2025-13898","title":"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 outpu…","summary":"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 outpu…","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2025-12-06","updated":"2026-10-15","sourceUpdated":"2026-10-15T20:10:00.197","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-13898","references":[{"url":"https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L39","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L44","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L39","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L44","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/20b3c88f-a0df-4814-83b6-27440c5ad38e?source=cve","label":"security@wordfence.com"}],"tags":["nvd"],"epss":0.0023,"epssPercentile":0.13691,"ingestedAt":"2026-10-27T18:12:09.293Z","slug":"CVE-2025-13898","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}