CVE-2026-33031: CWE-284: Improper Access Control in 0xJacky nginx-ui
CVE-2026-33031 is an improper access control vulnerability in 0xJacky's nginx-ui versions prior to 2. 3. 4. The issue allows users who have been disabled by an administrator to continue using previously issued API tokens until those tokens expire. This means that disabling a compromised account does not immediately revoke access, enabling an attacker with a stolen JWT to keep reading and modifying protected resources. Additionally, since tokens can be used to create new accounts, the disabled user may maintain privileges indefinitely. Version 2. 3. 4 addresses this vulnerability.
AI Analysis
Technical Summary
The vulnerability in nginx-ui before version 2.3.4 involves improper access control (CWE-284) where disabled users retain access via valid JWT tokens until token expiration. This flaw allows continued unauthorized access and potential privilege maintenance through token-based account creation. The issue is fixed in version 2.3.4.
Potential Impact
An attacker who has obtained a JWT token for a user account can continue to access and modify protected resources even after the account is disabled by an administrator. This undermines the effectiveness of account disabling as a security control and may allow persistent unauthorized access and privilege escalation through token reuse and new account creation.
Mitigation Recommendations
Upgrade nginx-ui to version 2.3.4 or later, where this vulnerability is patched. There is no official remediation level stated beyond this version upgrade. Until upgrading, administrators should be aware that disabling accounts does not immediately revoke token-based access.
CVE-2026-33031: CWE-284: Improper Access Control in 0xJacky nginx-ui
Description
CVE-2026-33031 is an improper access control vulnerability in 0xJacky's nginx-ui versions prior to 2. 3. 4. The issue allows users who have been disabled by an administrator to continue using previously issued API tokens until those tokens expire. This means that disabling a compromised account does not immediately revoke access, enabling an attacker with a stolen JWT to keep reading and modifying protected resources. Additionally, since tokens can be used to create new accounts, the disabled user may maintain privileges indefinitely. Version 2. 3. 4 addresses this vulnerability.
CVSS v4.0
Score 8.6high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in nginx-ui before version 2.3.4 involves improper access control (CWE-284) where disabled users retain access via valid JWT tokens until token expiration. This flaw allows continued unauthorized access and potential privilege maintenance through token-based account creation. The issue is fixed in version 2.3.4.
Potential Impact
An attacker who has obtained a JWT token for a user account can continue to access and modify protected resources even after the account is disabled by an administrator. This undermines the effectiveness of account disabling as a security control and may allow persistent unauthorized access and privilege escalation through token reuse and new account creation.
Mitigation Recommendations
Upgrade nginx-ui to version 2.3.4 or later, where this vulnerability is patched. There is no official remediation level stated beyond this version upgrade. Until upgrading, administrators should be aware that disabling accounts does not immediately revoke token-based access.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-17T17:22:14.669Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e6941f19fe3cd2cd32c48c
Added to database: 4/20/2026, 9:01:19 PM
Last enriched: 4/28/2026, 6:07:01 AM
Last updated: 6/4/2026, 8:22:46 PM
Views: 60
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