CVE-2023-28999
6.9 · MEDIUMOverview
CVE-2023-28999 is a medium-severity vulnerability affecting nextcloud desktop. It was published on April 4, 2023 and has a CVSS 3.1 base score of 6.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.9, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files. This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.
Remediation
Check the references section for vendor advisories and patches from nextcloud. Update desktop 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 | desktop | >= 3.0.0, < 3.8.0 | Affected |
| nextcloud | nextcloud | >= 3.0.5, < 4.8.0 | Affected |
References
Frequently Asked Questions
What is CVE-2023-28999?
CVE-2023-28999 is a medium-severity vulnerability affecting nextcloud desktop. It was published on April 4, 2023 and has a CVSS 3.1 base score of 6.9 (MEDIUM).
How severe is CVE-2023-28999?
This vulnerability has a CVSS 3.1 base score of 6.9, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2023-28999?
Check the references section for vendor advisories and patches from nextcloud. Update desktop 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-2023-28999?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-28999 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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