CVE-2026-43915

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 v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/coturn/coturn/releases/tag/4.11.0	Release Notes
https://github.com/coturn/coturn/security/advisories/GHSA-xxf5-9vj2-g84j	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:coturn_project:coturn:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-18 20:16

Updated : 2026-06-26 02:35

NVD link : CVE-2026-43915

Mitre link : CVE-2026-43915

CVE.ORG link : CVE-2026-43915

JSON object : View

Products Affected

coturn_project

coturn

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-43915", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43915", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-18T19:53:34.616522Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "coturn", "product": "coturn", "versions": [{"status": "affected", "version": "< 4.11.0"}]}]}], "published": "2026-06-18T20:16:13.287", "references": [{"url": "https://github.com/coturn/coturn/releases/tag/4.11.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coturn/coturn/security/advisories/GHSA-xxf5-9vj2-g84j", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-06-26T02:35:52.680", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:coturn_project:coturn:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E838C569-3F81-4CFE-8DC3-5C5973F53C60", "versionEndExcluding": "4.11.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}