Relevanssi Plugin up to 2.27.4/4.24.4 on WordPress Query Parameter sql injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Relevanssi Plugin up to 2.27.4/4.24.4 on WordPress. This vulnerability affects unknown code of the component Query Parameter Handler. Executing a manipulation can lead to sql injection. The identification of this vulnerability is CVE-2025-4396. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Relevanssi Plugin up to 2.27.4/4.24.4 on WordPress and classified as critical. This vulnerability affects an unknown functionality of the component Query Parameter Handler. The manipulation with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2025-4396 since 05/06/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/13/2025). The MITRE ATT&CK project declares the attack technique as T1505.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-14360). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Name

• Relevanssi Plugin

Version

• 2.27.0
• 2.27.1
• 2.27.2
• 2.27.3
• 2.27.4
• 4.24.0
• 4.24.1
• 4.24.2
• 4.24.3
• 4.24.4

CPE 2.3info

• 🔍
• 🔍
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CPE 2.2info

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• 🔍

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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