Twinklesmtp WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Twinklesmtp Email Service Provider for WordPress plugin, affecting all versions through 1.03. The issue arises from inadequate input sanitization and output escaping in the plugin's sender settings. This vulnerability allows authenticated attackers with administrator-level permissions to inject arbitrary web scripts into pages, which are executed when a user accesses the affected page. The vulnerability is present in multi-site installations where unfiltered_html has been disabled.

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.

Remediation

No known patch is available. It is recommended to review the vulnerability details and consider uninstalling the affected plugin.