CVE Catalog

CVE-2026-103426

HighCVSS 7.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.23%

13th percentile - higher than 13% of all known CVEs

Summary

The Relevanssi Premium plugin for WordPress in versions up to and including 2.31.4 is vulnerable to stored cross-site scripting (XSS) via the '_rt' parameter due to insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary scripts into pages that execute when a user visits the injected page. This requires the click-tracking and logging feature to be enabled, and exploitation is trivial because a valid '_rt_nonce' is publicly emitted on every search-results page.

Risk Assessment

An attacker can execute arbitrary JavaScript in the user's browser, potentially leading to session theft, redirects, or other actions in the context of the site. This affects user confidentiality and data integrity.

Recommendation

Update the Relevanssi Premium plugin to a version later than 2.31.4 as soon as available. If updating is not possible, consider disabling the click-tracking and logging feature or applying additional security measures.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS