CVE-2025-4594: Tournamatch <= 4.6.1 - Authenticated (Contributor+) Stored Cross-Site Scripting
Description
The Tournamatch plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'trn-ladder-registration-button' shortcode in all versions up to, and including, 4.6.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Classification
CVE ID: CVE-2025-4594
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.4
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: tournamatch
Product: Tournamatch
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 7.57% (scored less or equal to compared to others)
EPSS Date: 2025-06-05 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-4594https://www.wordfence.com/threat-intel/vulnerabilities/id/fc912831-bbdd-4f8f-a620-47e41b1b731d?source=cve
https://plugins.trac.wordpress.org/browser/tournamatch/tags/4.6.1/includes/shortcodes/class-shortcodes.php#L273
https://plugins.trac.wordpress.org/changeset/3295681/tournamatch/trunk/includes/shortcodes/class-shortcodes.php