CVE-2023-39961: Text does not respect "Allow download" permissions
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 24.0.4 and prior to versions 25.0.9, 26.0.4, and 27.0.1, when a folder with images or an image was shared without download permissions, the user could add the image inline into a text file and download it. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is CVE-2023-39961?
CVE-2023-39961 is a vulnerability in Nextcloud Server that allows users to add an image inline into a text file when a folder with images or an image was shared without download permissions.
How does CVE-2023-39961 affect Nextcloud Server?
CVE-2023-39961 affects Nextcloud Server versions 24.0.4 and prior to versions 25.0.9, 26.0.4, and 27.0.1.
What is the severity of CVE-2023-39961?
The severity of CVE-2023-39961 is medium with a CVSS score of 4.3.
How can I fix CVE-2023-39961?
To fix CVE-2023-39961, update Nextcloud Server to version 25.0.9, 26.0.4, or 27.0.1.
Where can I find more information about CVE-2023-39961?
You can find more information about CVE-2023-39961 on the GitHub security advisory page and the HackerOne report.