CVE-2023-39961

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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-39961
https://www.cve.org/CVERecord?id=CVE-2023-39961
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp
https://github.com/nextcloud/text/pull/4481
https://hackerone.com/reports/1965156

Bug ID	1214177
Summary	VUL-0: CVE-2023-39961: nextcloud: image download restriction bypass
Classification	openSUSE
Product	openSUSE Distribution
Version	Leap 15.4
Hardware	Other
URL	https://smash.suse.de/issue/374997/
OS	Other
Status	NEW
Severity	Normal
Priority	P5 - None
Component	Security
Assignee	ecsos@schirra.net
Reporter	carlos.lopez@suse.com
QA Contact	security-team@suse.de
Target Milestone	---
Found By	---
Blocker	---