CVE-2026-4142

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.

Published: 2026-04-22 Last update: 2026-04-22 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: —
View at NVD, CVE.org, EUVD

CVE-2026-4142 is rated Low Risk (19.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-4142

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-22 — 0.02% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-4142

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.3 2.7 [email protected]

Weakness enumeration for CVE-2026-4142

GitHub Security Advisory for CVE-2026-4142

GHSA-95vj-cwqx-rpmc · Severity: medium — The Sentence To SEO (keywords, description and tags) plugin for WordPress is vulnerable to Stored...

Affected software / configurations for CVE-2026-4142

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-4142

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