CVE-2026-4142Disclosure

LOWCVSS 4.4 · MEDIUM

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD 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.

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1.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-79

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Threat summary

Public PoC is present in monitored signal
3 mentions across 3 observed days
Momentum state: stable

What's happening

PoC mentioned or linked in 1 signal
Technical details provided in 3 signals
Disclosure: 2 classified signals
Peaked 2d ago at 1 mentions (2026-04-22); latest day: 1
3 total mentions across 3 days

Deep dive

Activity timeline3 mentions / 3d

Signal classification2 categories

Disclosure

266.7%

PoC

133.3%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-04-22	1	Disclosure1
2026-04-23	1	Disclosure1
2026-04-25	1	PoC1

Full discourse3 posts

Atomic Edge@atomicedgeWAF165d
PoC
https://atomicedge.io/cve-proof/cve-2026-4142-sentence-to-seo-version-1-0-medium-vulnerability-proof-of-concept CVE-2026-4142 #WordPress plugin #vulnerability sentence-to-seo #cybersecurity #wordpressfirewall #wordpresssecurity #hacking #wpsecurity #atomicedge
Post summary
A proof‑of‑concept for CVE‑2026‑4142 is referenced via a URL, indicating that the vulnerability has been demonstrated but no active exploitation, patch, or false‑positive claim is reported.
0000040
6 followersView on X
CVE@CVEnew167d
Disclosure
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 version… https://www.cve.org/CVERecord?id=CVE-2026-4142
Post summary
The Sentence To SEO plugin for WordPress is affected by a stored XSS vulnerability in the 'Permanent keywords' field across all versions; this is a straightforward disclosure with no PoC, exploitation report, or patch information.
00000115
57.2K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds169d
Disclosure
CVE-2026-4142 Stored Cross-Site Scripting in Sentence To SEO Plugin for WordPress Up to 1.0 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-4142
Post summary
The text announces a stored XSS vulnerability (CVE-2026-4142) in the Sentence To SEO WordPress plugin, providing no additional details beyond its basic classification.
0000049
4.0K followersView on X

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