Server-Side Request Forgery (SSRF) in Nextcloud Enterprise Server and Nextcloud Server - CVE-2023-48306
Published: November 21, 2023
Vulnerability identifier: #VU83359
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2023-48306
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input in DNS pin middleware. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Affected software
Nextcloud Enterprise Server
Nextcloud Server
Nextcloud Server
How to mitigate CVE-2023-48306
Install updates from vendor's website.
Nextcloud Enterprise Server - addressed in versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, 27.1.0
Nextcloud Server - addressed in versions 25.0.11, 26.0.6, 27.1.0
Nextcloud Server - addressed in versions 25.0.11, 26.0.6, 27.1.0