CVE-2025-5016 - CVE House

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Status published Medium CVE-2025-5016

Relevanssi <= 4.24.5 (Free) and <= 2.27.6 (Premium) - Unauthenticated Stored Cross-Site Scripting via Excerpt Highlights

4.7 CVSS

Vulnerability Description

The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Excerpt Highlights in all versions up to, and including, 4.24.5 (Free) and 2.27.6 (Premium) due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Jack Taylor

References

More from Relevanssi

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Relevanssi <= 4.24.4 (Free) and <= 2.27.5 (Premium) - Unauthenticated SQL Injection

Relevanssi <= 4.24.3 (Free) and <= 2.27.4 (Premium) - Unauthenticated Stored Cross-Site Scripting via Search Highlights

Relevanssi <= 4.22.2 (Free) and <= 2.25.1 (Premium) - Unauthenticated Information Exposure

Relevanssi – A Better Search <= 4.22.1 - Unauthenticated Second Order CSV Injection

Relevanssi – A Better Search <= 4.22.1 - Missing Authorization to Unauthenticated Count Option Update

Affected Vendor

Relevanssi

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Affected Software

Relevanssi Premium, Relevanssi – A Better Search

Vulnerable Versions:

0

Timeline

Official Publish: May 31st, 2025

Last Modified: April 8th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement