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CVE-2026-43915— Coturn: Stored Cross-Site Scripting (XSS) in web-admin interface via TURN username

Quick assessment

Affected
coturn coturn
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Coturn是Coturn组织开源的一款TURN(VoIP媒体业务NAT穿越服务器和网关)和STUN(用户数据报协议简单穿越网络地址转换器)Server的开源实现。 Coturn 4.11.0之前版本存在跨站脚本漏洞，该漏洞源于web-admin HTTPS界面存储型跨站脚本漏洞，攻击者可通过特制的USERNAME值注入HTML/JavaScript，在认证管理员查看TURN会话列表时执行。

CVSS 5.4 · Medium EPSS 0.24% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
coturn coturn < 4.11.0 affected
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I. Basic Information for CVE-2026-43915

Vulnerability Information
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Vulnerability Title
Coturn: Stored Cross-Site Scripting (XSS) in web-admin interface via TURN username
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Coturn 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Coturn是Coturn组织开源的一款TURN(VoIP媒体业务NAT穿越服务器和网关)和STUN(用户数据报协议简单穿越网络地址转换器)Server的开源实现。 Coturn 4.11.0之前版本存在跨站脚本漏洞，该漏洞源于web-admin HTTPS界面存储型跨站脚本漏洞，攻击者可通过特制的USERNAME值注入HTML/JavaScript，在认证管理员查看TURN会话列表时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
coturn coturn < 4.11.0 -

II. Public POCs for CVE-2026-43915

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III. Intelligence Information for CVE-2026-43915

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Vendor Advisories for CVE-2026-43915 (1)

Vendor Pages for CVE-2026-43915 (1)

IV. Related Vulnerabilities

Same product: coturn
Same vendor: coturn
Same weakness: CWE-79

V. Comments for CVE-2026-43915

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