Vulnerability Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and starting in version 20.0.0 and prior to versions 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Enterprise Server, a malicious user could update any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud Server 25.0.13, 26.0.8, and 27.1.3 and Nextcloud Enterprise Server is upgraded to 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, and 27.1.3 contain a patch for this issue. As a workaround, disable app files_external. This workaround also makes the external storage inaccessible but retains the configurations until a patched version has been deployed.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | >= 20.0.0, < 20.0.14.16 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hVendor Advisory
- https://github.com/nextcloud/server/pull/41123Patch
- https://hackerone.com/reports/2212627Exploit
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hVendor Advisory
- https://github.com/nextcloud/server/pull/41123Patch
- https://hackerone.com/reports/2212627Exploit
FAQ
What is CVE-2023-48239?
CVE-2023-48239 is a vulnerability with a CVSS score of 8.5 (HIGH). Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and starting in ve...
How severe is CVE-2023-48239?
CVE-2023-48239 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-48239?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Nextcloud Server.