CVE-2023-48306

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
nextcloud	security-advisories	>= 22.0.0, < 22.2.10.16; >= 23.0.0, < 23.0.12.11; >= 24.0.0, < 24.0.12.7; >= 25.0.0, < 25.0.11; >= 26.0.0, < 26.0.6; >= 27.0.0, < 27.1.0

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3vVendor Advisory
https://github.com/nextcloud/server/pull/40234Exploit, Issue Tracking, Patch
https://hackerone.com/reports/2115212Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3vVendor Advisory
https://github.com/nextcloud/server/pull/40234Exploit, Issue Tracking, Patch
https://hackerone.com/reports/2115212Permissions Required

Timeline

Published: Nov 21, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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