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CVE-2026-84313— Nginx UI: TOTP / passkey enrolment requires no re-authentication, enabling persistent account takeover

Quick assessment

Affected
0xJacky nginx-ui
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.

Nginx UI 是 Nginx Web 服务器的 Web 管理界面。在版本 2.4.1 之前，POST /api/otp_enroll 和 POST /api/finish_passkey_register 这两个接口未受 RequireSecureSession 保护，它们接受普通的已认证会话，而不验证当前密码。攻击者若窃取了 JWT（JSON Web Token），可以在受害者尚未启用 TOTP（基于时间的一次性密码）时，绑定由攻击者控制的 TOTP 密钥；或者在注册路径缺乏等效的“已有绑定检查”机制的情况下

CVSS 8.8 · High EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
0xJacky nginx-ui < 2.4.1 affected
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I. Basic Information for CVE-2026-84313

Vulnerability Information
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Vulnerability Title
Nginx UI: TOTP / passkey enrolment requires no re-authentication, enabling persistent account takeover
Source: CVE Program / CVE List V5
Vulnerability Description
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, POST /api/otp_enroll and POST /api/finish_passkey_register are registered outside RequireSecureSession and accept a normal authenticated session without verifying the current password. An attacker with a stolen JWT can bind an attacker-controlled TOTP secret when the victim has not already enabled TOTP, or can register an attacker-controlled passkey because that path has no equivalent existing-enrollment guard. These changes create persistent account access that can survive a password change and interfere with the legitimate user's authentication. This issue is fixed in version 2.4.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
0xJacky nginx-ui < 2.4.1 -

II. Public POCs for CVE-2026-84313

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III. Intelligence Information for CVE-2026-84313

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Vendor Advisories for CVE-2026-84313 (1)

Same Patch Batch · 0xJacky · 2026-10-12 · 11 CVEs total

CVE-2026-84318 8.8 HIGH Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE
CVE-2026-84316 8.8 HIGH Nginx UI: nginx config directive denylist (ValidateConfigFile) is bypassable via same-line
CVE-2026-84317 8.8 HIGH Nginx UI: MCP nginx_config_add skips config directive validation → authenticated nginx dir
CVE-2026-84314 8.7 HIGH Nginx UI: Account Takeover via Missing `RequireSecureSession` on User Management Endpoint
CVE-2026-84315 8.3 HIGH Nginx UI OTP secure-session step-up is missing on sensitive mutation routes
CVE-2026-84319 8.3 HIGH Nginx UI: MCP configuration tools bypass restricted directive validation and allow seconda
CVE-2026-84360 8.1 HIGH Nginx UI: OTP secure-session step-up can be bypassed via MCP configuration tools
CVE-2026-84312 7.1 HIGH Nginx UI: Casdoor SSO callback uses a constant `state` parameter (login CSRF)
CVE-2026-84320 6.3 MEDIUM Nginx UI: Auto backup name allows path traversal outside validated storage path
CVE-2026-84321 5.4 MEDIUM Nginx UI: Standalone short tokens survive administrative revocation in cache and authentic

IV. Related Vulnerabilities

Same product: nginx-ui
Same vendor: 0xJacky
Same weakness: CWE-287

V. Comments for CVE-2026-84313

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