CVE-2026-0555
Unknown Unknown - Not Provided
Stored XSS in Premmerce WordPress Plugin via AJAX Endpoint

Publication date: 2026-02-07

Last updated on: 2026-04-08

Assigner: Wordfence

Description
The Premmerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'premmerce_wizard_actions' AJAX endpoint in all versions up to, and including, 1.3.20. This is due to missing capability checks and insufficient input sanitization and output escaping on the `state` parameter. This makes it possible for authenticated attackers, with subscriber level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page (the Premmerce Wizard admin page).
CVSS Scores
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Meta Information
Published
2026-02-07
Last Modified
2026-04-08
Generated
2026-05-27
AI Q&A
2026-02-07
EPSS Evaluated
2026-05-25
NVD
CVE-2026-0555
EUVD
EUVD-2026-5740
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
premmerce premmerce_plugin to 1.3.20 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
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.
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

The Premmerce plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the 'premmerce_wizard_actions' AJAX endpoint in all versions up to and including 1.3.20.

This vulnerability exists because the plugin does not properly check user capabilities and fails to sanitize and escape the 'state' parameter correctly.

As a result, authenticated users with subscriber level access or higher can inject malicious scripts that will execute whenever a user visits the affected Premmerce Wizard admin page.


How can this vulnerability impact me? :

This vulnerability allows attackers with low-level authenticated access to inject arbitrary web scripts into the Premmerce Wizard admin page.

These scripts can execute in the context of other users visiting the page, potentially leading to theft of sensitive information, session hijacking, or unauthorized actions performed on behalf of users.

The CVSS score of 6.4 indicates a medium severity impact, with potential confidentiality and integrity loss but no direct availability impact.


How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:

I don't know


How can this vulnerability be detected on my network or system? Can you suggest some commands?

I don't know


What immediate steps should I take to mitigate this vulnerability?

I don't know


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