CVE-2025-4396: Relevanssi <= 4.24.4 (Free) and <= 2.27.4 (Premium) - Unauthenticated SQL Injection
Description
The Relevanssi – A Better Search plugin for WordPress is vulnerable to time-based SQL Injection via the cats and tags query parameters in all versions up to, and including, 4.24.4 (Free) and <= 2.27.4 (Premium) due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries to already existing queries that can be used to extract sensitive information from the database.
Classification
CVE ID: CVE-2025-4396
CVSS Base Severity: HIGH
CVSS Base Score: 7.5
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Problem Types
CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')Affected Products
Vendor: Relevanssi, msaari
Product: Relevanssi – A Better Search (Pro), Relevanssi – A Better Search
Nuclei Template
http/cves/2025/CVE-2025-4396.yaml
Exploit Prediction Scoring System (EPSS)
EPSS Score: 15.02% (probability of being exploited)
EPSS Percentile: 94.2% (scored less or equal to compared to others)
EPSS Date: 2025-06-11 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-4396https://www.wordfence.com/threat-intel/vulnerabilities/id/197be163-4504-4caa-b729-c3293463cfb5?source=cve
https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.24.4/lib/search-tax-query.php#L409
https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.24.4/lib/search.php#L982
https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.24.4/lib/search.php#L1016
https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.24.4/lib/search-tax-query.php#L371