CVE-2026-4142

MEDIUM EPSS 24.4%

Published Apr 22, 20262mo ago · Modified Jun 17, 20262w ago

4.4 CVSS 3.1

Medium

Published Apr 22, 2026 2mo ago

Last Modified Jun 17, 2026 2w ago

Description

The Sentence To SEO (keywords, description and tags) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Permanent keywords' field in all versions up to and including 1.0. This is due to insufficient input sanitization and output escaping. The plugin reads user input via filter_input_array(INPUT_POST) which applies no HTML sanitization (FILTER_DEFAULT), stores it unsanitized to the WordPress options table via update_option(), and then outputs the stored value directly into a textarea element without any escaping using PHP short echo tags (<?= ?>). An attacker can break out of the textarea element using a closing </textarea> tag and inject arbitrary HTML/JavaScript. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the plugin's settings page.

CVSS Details

Base Score

4.4

Exploitability

1.3

Impact

2.7

Vector string

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

Attack Vector Network

Attack Complexity High

Privileges Required High

User Interaction None

Scope Changed

Confidentiality Low

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

24.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 11

plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L262
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L50
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L75
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L81
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L87
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L262
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L50
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L75
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L81
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L87
wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/7d11b2db-d097-433f-923c-f49ef2951c0e?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.