CVE-2026-97641
Relevanssi <= 4.28.3 - Unauthenticated Stored Cross-Site Scripting via Comment Content
Description
The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content in all versions up to, and including, 4.28.3 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 is only exploitable when the administrator has configured a non-empty value for the "Allowable tags in excerpts" setting, such as the default example value of <p><a><strong>, as the prefix-matching regex must have an allowable tag whose name is a prefix of the injected tag name.
INFO
Published Date :
Oct. 2, 2026, 8:17 a.m.
Last Modified :
Oct. 2, 2026, 8:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Relevanssi plugin to the latest version.
- Sanitize all user-provided comment content.
- Escape output shown on pages.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-97641.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-97641 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-97641
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-97641 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-97641 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added Description The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content in all versions up to, and including, 4.28.3 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 is only exploitable when the administrator has configured a non-empty value for the "Allowable tags in excerpts" setting, such as the default example value of <p><a><strong>, as the prefix-matching regex must have an allowable tag whose name is a prefix of the injected tag name. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/97xxx/CVE-2026-97641.json">CVE-2026-97641</a> Added Reference https://github.com/msaari/relevanssi/commit/3dddec3416fbda298e18649127f31557398d10b0 Added Reference https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.3/lib/admin-ajax.php#L492 Added Reference https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.3/lib/excerpts-highlights.php#L216 Added Reference https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.3/lib/excerpts-highlights.php#L421 Added Reference https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.3/lib/excerpts-highlights.php#L883 Added Reference https://plugins.trac.wordpress.org/browser/relevanssi/tags/4.28.3/lib/indexing.php#L1067 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/47751ff1-2f22-4335-8e75-7ff1b6214426?source=cve