Headline
CVE-2023-48301: HTML injection in search UI when selecting a circle with HTML in the display name
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 Nextcloud Enterprise Server, an attacker could insert links into circles name that would be opened when clicking the circle name in a search filter. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.13, 26.0.8, and 27.1.3 contain a fix for this issue. As a workaround, disable app circles.
Package
Server (Nextcloud)
Affected versions
>= 25.0.0, >= 26.0.0, >= 27.0.0
Patched versions
25.0.13, 26.0.8, 27.1.3
Server (Nextcloud Enterprise)
>= 25.0.0, >= 26.0.0, >= 27.0.0
Description
Impact
An attacker could insert links into circles name that would be opened when clicking the circle name in a search filter.
Patches
It is recommended that the Nextcloud Server is upgraded to 25.0.13, 26.0.8 or 27.1.3
It is recommended that the Nextcloud Enterprise Server is upgraded to 25.0.13, 26.0.8 or 27.1.3
Workarounds
- Disable app circles
References
- HackerOne
- PullRequest
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at portal.nextcloud.com