CVE-2023-49792

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when a (reverse) proxy is configured as trusted proxy the server could be tricked into reading a wrong remote address for an attacker, allowing them executing authentication attempts than intended. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.

• CWE-307

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5j2p-q736-hw98Vendor Advisory
• https://github.com/nextcloud/server/pull/41526Patch
• https://hackerone.com/reports/2230915Permissions Required
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5j2p-q736-hw98Vendor Advisory
• https://github.com/nextcloud/server/pull/41526Patch
• https://hackerone.com/reports/2230915Permissions Required

Published

Dec 22, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-49786Asterisk is an open source private branch exchange and telep…5.9
• CVE-2023-49787Rejected reason: CVE request originates from private reposit…
• CVE-2023-49788Collabora Online is a collaborative online office suite base…7.2
• CVE-2023-4979Cross-site Scripting (XSS) - Reflected in GitHub repository …5.4
• CVE-2023-49790The Nextcloud iOS Files app allows users of iOS to interact …4.3
• CVE-2023-49791Nextcloud Server provides data storage for Nextcloud, an ope…5.4
• CVE-2023-49793CodeChecker is an analyzer tooling, defect database and view…6.5
• CVE-2023-49794KernelSU is a Kernel-based root solution for Android devices…7.8
• CVE-2023-49795MindsDB connects artificial intelligence models to real time…5.3
• CVE-2023-49796MindsDB connects artificial intelligence models to real time…5.3
• CVE-2023-49797PyInstaller bundles a Python application and all its depende…7.8
• CVE-2023-49798OpenZeppelin Contracts is a library for smart contract devel…7.5