CVE-2025-5236Network attack vector

Stored XSS via unescaped username block attribute

Published May 30, 2025 · Updated Apr 8, 2026

Stored cross-site scripting in Ninja Team WP Telegram Chat Widget 1.1 and earlier allows remote authenticated users to inject scripts via username. The block rendering path in blocks/src/init.php accepts the username attribute without sufficient input sanitization and emits it without context-appropriate output escaping. Contributor-level access is sufficient to store the payload in a page, and the script runs in a visitor browser when that page is opened, permitting actions within that visitor’s WordPress session.

CVSS severity5.4
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in Ninja Team WP Telegram Chat Widget 1.1 and earlier allows remote authenticated users to inject scripts via username. The block rendering path in blocks/src/init.php accepts the username attribute without sufficient input sanitization and emits it without context-appropriate output escaping. Contributor-level access is sufficient to store the payload in a page, and the script runs in a visitor browser when that page is opened, permitting actions within that visitor’s WordPress session.

The record

CVE
CVE-2025-5236
Published
May 30, 2025
Updated
Apr 8, 2026
Vendor
Ninja Team
Product
WP Telegram Chat Widget
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ninja Team · WP Telegram Chat Widgetversion=0 <=1.1

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo