CVE-2026-4142
Sentence To SEO (keywords, description and tags) <= 1.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Permanent keywords' Field
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.
INFO
Published Date :
April 22, 2026, 9:16 a.m.
Last Modified :
April 22, 2026, 9:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-4142
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Sentence To SEO plugin.
- Verify input sanitization and output escaping.
- Remove any injected malicious scripts.
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-2026-4142.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4142 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-2026-4142
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-2026-4142 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-4142 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]
Apr. 22, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L262 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L50 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L75 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L81 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/tags/1.0/index.php#L87 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L262 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L50 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L75 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L81 Added Reference https://plugins.trac.wordpress.org/browser/sentence-to-seo/trunk/index.php#L87 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/7d11b2db-d097-433f-923c-f49ef2951c0e?source=cve