CVE-2026-9729
Received Received - Intake

Stored XSS in Webpushr Push Notifications WordPress Plugin

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: Wordfence

Description
The Webpushr Push Notifications plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'webpushr_notification_title' and 'webpushr_notification_body' parameters in versions up to, and including, 4.39.0. This is due to insufficient input sanitization in the save_send_notification_flag() function and missing output escaping in the wpp_notification_box() function, which concatenates raw post meta values directly into HTML attribute and textarea contexts. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-07-23
Last Modified
2026-07-23
Generated
2026-07-23
AI Q&A
2026-07-23
EPSS Evaluated
N/A
NVD
CVE-2026-9729

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
webpushr webpushr_push_notifications to 4.39.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Webpushr Push Notifications WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via the webpushr_notification_title and webpushr_notification_body parameters. The issue stems from improper input sanitization and lack of output escaping in specific plugin functions.

Detection Guidance

Check WordPress plugins for Webpushr Push Notifications version 4.39.0 or lower. Inspect notification parameters in the database for stored scripts. Use WordPress admin access logs to identify unauthorized edits by contributors or higher roles.

Impact Analysis

An attacker could inject scripts that execute when users visit affected pages. This may lead to theft of session cookies, account takeovers, or defacement of your WordPress site. The impact depends on the injected script's purpose, but it generally compromises user trust and site integrity.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements. If exploited, it may result in data breaches, triggering compliance violations, legal penalties, and reputational damage for organizations handling sensitive user information.

Mitigation Strategies

Update the Webpushr Push Notifications plugin to the latest version. Remove suspicious scripts from notification titles and bodies. Restrict contributor-level access to trusted users only.

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