CVE-2023-23943
5.0 · MEDIUMOverview
CVE-2023-23943 is a medium-severity vulnerability affecting nextcloud mail. It was published on February 6, 2023 and has a CVSS 3.1 base score of 5.0 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from nextcloud. Update mail to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nextcloud | >= 0, < 1.15.0 | Affected |
References
Frequently Asked Questions
What is CVE-2023-23943?
CVE-2023-23943 is a medium-severity vulnerability affecting nextcloud mail. It was published on February 6, 2023 and has a CVSS 3.1 base score of 5.0 (MEDIUM).
How severe is CVE-2023-23943?
This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2023-23943?
Check the references section for vendor advisories and patches from nextcloud. Update mail to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-23943?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-23943 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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