vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-43915

Coturn: Stored Cross-Site Scripting (XSS) in web-admin interface via TURN username

MEDIUM
5.4
CVSS Score
Published: June 18, 2026 at 07:33 PM UTC
Updated: June 27, 2026 at 11:41 AM UTC
1 product affected across 1 vendorCoturn

Using coturn by coturn?

Get instant alerts when new vulnerabilities affect coturn - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Coturn· Coturn Project
95%
v < 4.11.0
Affected range stops below 4.11.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/coturn/coturn/security/advisories/GHSA-xxf5-9vj2-g84j
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/coturn/coturn/releases/tag/4.11.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card