CVE-2026-43915 | Coturn is a free open source implementation of TURN and STUN… | CVSS 5.4 MEDIUM

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.

Metadata

CVE ID: CVE-2026-43915
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-04 16:11 UTC
Published: 2026-06-18 19:33 UTC
Last updated: 2026-06-18 19:53 UTC
Primary CWE: CWE-79
CWE-79: Improper Neutralization of Input During Web Page Gen…
Vendor / Product: coturn / coturn
Sources: cve.org · NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
coturn	coturn	—	< 4.11.0

Weakness (CWE)

CWE	Source	Description
CWE-79	cna	CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.4	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References (2)

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