CVE-2026-116522

Relevanssi <= 4.28.5 - Unauthenticated Stored Cross-Site Scripting via Comment Content via Late Entity Decode

Published Oct 31, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.28.5 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 site to have both the comment indexing and comment highlighting options enabled, and the payload only fires when a visitor reaches a singular page via a Relevanssi search-result permalink carrying the highlight query parameter.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Comesio
Comesio relevanssi – A Better Search
Wordpress-extensions
Wordpress-extensions relevanssi
Vendors & Products Comesio
Comesio relevanssi – A Better Search
Wordpress-extensions
Wordpress-extensions relevanssi
Type Values Removed Values Added
Description The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.28.5 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 site to have both the comment indexing and comment highlighting options enabled, and the payload only fires when a visitor reaches a singular page via a Relevanssi search-result permalink carrying the highlight query parameter.
Title Relevanssi <= 4.28.5 - Unauthenticated Stored Cross-Site Scripting via Comment Content via Late Entity Decode
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Nov 1, 2026, 5:44 PM
Reserved
Oct 26, 2026, 2:05 PM
Status
Deferred
Published
Oct 31, 2026, 7:16 AM
Modified
Nov 2, 2026, 4:19 PM