eazyserver Sentence To SEO Plugin up to 1.0 on WordPress Setting update_option cross site scripting

Summaryinfo

A vulnerability was found in eazyserver Sentence To SEO Plugin up to 1.0 on WordPress. It has been declared as problematic. This vulnerability affects the function update_option of the component Setting Handler. The manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-4142. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in eazyserver Sentence To SEO Plugin up to 1.0 on WordPress. Affected is the function update_option of the component Setting Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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 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.

The weakness was disclosed by Muhammad Nur Ibnu Hubab. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-4142 since 03/13/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• eazyserver

Name

• Sentence To SEO Plugin

Version

• 1.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Once again VulDB remains the best source for vulnerability data.

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