YaySMTP WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the YaySMTP plugin for WordPress, specifically in versions through 1.1.1. The issue arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts into pages. These scripts are executed when a user accesses the affected page.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Reproduction

The vulnerability can be reproduced by uploading a script payload into a field that does not properly sanitize input. After saving the settings, the injected script will execute when the email log details are viewed.

Remediation

Users can update to YaySMTP version 1.2 or later, which addresses the XSS vulnerability by improving input sanitization and output escaping.