XSS in Pechenki Telsender – Сontact Form 7, Events, Wpforms, Ninja Forms And Woocommerce To Telegram Bot

CVE-2026-15298

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (35.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-15298: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-15298?
CVE-2026-15298 is a high-severity vulnerability in Pechenki Telsender – Сontact Form 7, Events, Wpforms, Ninja Forms And Woocommerce To Telegram Bot, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-07-10.
How severe is CVE-2026-15298?
High severity. CVSS v3 base score is 7.2 out of 10.