---
id: CVE-2026-103426
title: >-
  The Relevanssi Premium plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the '_rt' parameter in all versions up to, and including, 2.31.4
  due to insufficient input sanitization and output escaping
summary: >-
  The Relevanssi Premium plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the '_rt' parameter in all versions up to, and including, 2.31.4
  due to insufficient input sanitization and output escaping. This makes it
  possi…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: Relevanssi
product: Relevanssi Premium
affected:
  - premium <= 2.31.4
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T13:18:55.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103426'
references:
  - url: 'https://www.relevanssi.com/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/769a39e0-f626-4c48-a1bb-c9f2402b3098?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T08:14:06.217Z'
---

## Overview

The Relevanssi Premium plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '_rt' parameter in all versions up to, and including, 2.31.4 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. This requires the click-tracking and logging feature to be activated in the plugin settings, and exploitation is trivially accessible to unauthenticated users because a valid _rt_nonce is publicly emitted on every search-results page.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.