What the vulnerability does
01Description
The TelSender plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting in all versions up to, and including, 1.14.14. This is due to insufficient input sanitization when processing Telegram API responses containing attacker-controlled chat titles. This makes it possible for unauthenticated attackers to inject malicious scripts via Telegram chat titles that execute when an administrator opens the TelSender settings page and clicks the "Tested" button.
Explanation of Vulnerability in Simple Terms
02Summary
TelSender versions up to 1.14.14 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into web pages viewed by site visitors. The vulnerability affects the plugin's handling of user input across Contact Form 7, Events Calendar, WPForms, Ninja Forms, and WooCommerce integrations. No authentication is required to exploit this issue. Site administrators should update to a version newer than 1.14.14.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that executes in visitors' browsers and affects other users on the site.
Potential impact on your site
04Site Impact
Visitors' browsers could be compromised; attackers could steal session tokens, redirect users, or deface forms.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
July 10, 2026
CVE published
