Description
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| github.com/0xjacky/nginx-ui | โ | โ |
| nginx-ui | โ | 2.3.3 |
References
Similar Threats
- Medium CVE-2026-42220
- High CVE-2026-42221
- High CVE-2026-42222
- Medium CVE-2026-42223
- Critical CVE-2026-42238
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