CVE-2026-43915

MEDIUM EPSS 3.8%

Published Jun 18, 20262w ago · Modified Jun 22, 20261w ago

5.4 CVSS 3.1

Medium

Published Jun 18, 2026 2w ago

Last Modified Jun 22, 2026 1w ago

Description

Coturn is a free open source implementation of TURN and STUN Server. Versions prior to 4.11.0 contain a stored cross-site scripting (XSS) vulnerability in the web-admin HTTPS interface. An attacker who can create a TURN allocation with a crafted USERNAME value can inject HTML/JavaScript that executes when an authenticated web-admin user views the TURN session list. In configurations using anonymous TURN access (--no-auth), this may be exploitable without TURN credentials. In authenticated deployments, exploitation requires valid TURN credentials or control over a provisioned username. This issue has been fixed in version 4.11.0.

CVSS Details

Base Score

5.4

Exploitability

2.3

Impact

2.7

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction Required

Scope Changed

Confidentiality Low

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

3.8% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 2

github.com https://github.com/coturn/coturn/releases/tag/4.11.0
github.com https://github.com/coturn/coturn/security/advisories/GHSA-xxf5-9vj2-g84j

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.