CVE-2023-39961 Text does not respect "Allow download" permissions

What is CVE-2023-39961?

CVE-2023-39961 is a low-severity vulnerability in Nextcloud Nextcloud Server, published on 10 Aug 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-284

Which versions are affected by CVE-2023-39961?

It affects 1 product.

Products include Nextcloud Nextcloud Server.

How do I fix CVE-2023-39961?

No fix has been published for CVE-2023-39961 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-39961 being exploited?

There is no known exploitation of CVE-2023-39961 in the wild and no public exploit code.

Other vulnerabilities in Nextcloud Nextcloud Server

• CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server Critical 9.3
• CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server Critical 9.1
• CVE-2018-3775 Auth bypass in Nextcloud Server High 8.8
• CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected High 8.7
• CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended High 8.7

All Nextcloud Nextcloud Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qhgm-w4gx-gvgp.