CVE-2026-87888
Received Received - Intake

Stored Cross-Site Scripting in YayPricing WordPress Plugin

Publication date: 2026-09-12

Last updated on: 2026-09-12

Assigner: WPScan

Description
The YayPricing WordPress plugin before 3.5.7 does not perform an authorization check on a REST route that saves its pricing rules, allowing users with the subscriber role and above to store JavaScript that executes in the browser of an administrator who opens the YayPricing WordPress plugin before 3.5.7's settings page.

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Meta Information

Published
2026-09-12
Last Modified
2026-09-12
Generated
2026-09-12
AI Q&A
2026-09-12
EPSS Evaluated
N/A
NVD
CVE-2026-87888
EUVD
EUVD-2026-76801

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
yaypricing yaypricing to 3.5.7 (exc)
yaypricing wordpress_plugin to 3.5.7 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

The YayPricing WordPress plugin before version 3.5.7 has a stored Cross-Site Scripting (XSS) vulnerability. This allows users with subscriber privileges or higher to inject malicious JavaScript code via an improperly secured REST route. When an administrator views the plugin's settings page, the injected script executes in their browser.

Detection Guidance

Check if the YayPricing WordPress plugin version is below 3.5.7. Inspect network traffic for unauthorized REST route calls to save_page_data. Look for suspicious JavaScript injections in plugin settings pages.

Impact Analysis

An attacker could steal session cookies, perform actions on your behalf, or redirect you to malicious sites. Administrators are particularly at risk as the injected script runs when they access the plugin settings. This could lead to unauthorized account access or data theft.

Compliance Impact

This vulnerability could violate GDPR by exposing user data or HIPAA by compromising protected health information if the WordPress site handles such data. Non-compliance risks fines and legal penalties due to unauthorized data access or breaches.

Mitigation Strategies

Update the YayPricing plugin to version 3.5.7 or higher immediately. Remove unnecessary user roles with subscriber access. Monitor plugin settings for unauthorized changes.

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