Server-Side Request Forgery (SSRF) in Nextcloud Mail

Published: 2023-05-29
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-33184
Exploitation vector Network
Public exploit N/A
Vulnerable software
Nextcloud Mail
Web applications / Modules and components for CMS

Vendor Nextcloud

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU76586

Risk: Low


CVE-ID: CVE-2023-33184

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No


The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in the Mail app on avatar endpoint. 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.


Install updates from vendor's website.

Vulnerable software versions

Nextcloud Mail: 1.12.0 - 2.3.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?