CVE-2023-23943 MEDIUM

CVE-2023-23943: Blind SSRF via server URL input in the Nextcloud Mail app

Vendor Nextcloud
Product security-advisories
Weakness CWE-918 · SSRF
Published February 6, 2023
Last update March 10, 2025
View on NVD All CVEs

CVSS base score

5.0/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

What the vulnerability does

01Description

Nextcloud mail is an email app for the nextcloud home server platform. In affected versions the SMTP, IMAP and Sieve host fields allowed to scan for internal services and servers reachable from within the local network of the Nextcloud Server. It is recommended that the Nextcloud Maill app is upgraded to 1.15.0 or 2.2.2. The only known workaround for this issue is to completely disable the nextcloud mail app.

Key dates

02Disclosure timeline

February 6, 2023 CVE published
March 10, 2025 Record updated