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CVE-2023-23943

Good to know:

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Date: February 6, 2023

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.

Language: PHP

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2023-23943
https://hackerone.com/reports/1736390
https://hackerone.com/reports/1741525
https://github.com/nextcloud/mail/pull/7796
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8gcx-r739-9pf6
https://hackerone.com/reports/1746582
https://www.mend.io/vulnerability-database/CVE-2023-23943

Severity Score

Weakness Type (CWE)

Server-Side Request Forgery (SSRF)

CWE-918

Top Fix

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Upgrade Version

Upgrade to version v1.15.0;v2.2.2

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CVSS v3.1

Base Score:
Attack Vector (AV): ADJACENT_NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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