Bug 2419456 (CVE-2025-66512) - CVE-2025-66512 nextcloud-server: Nextcloud Server XSS in SVG images when opened outside of Nextcloud
Summary: CVE-2025-66512 nextcloud-server: Nextcloud Server XSS in SVG images when open...
Keywords:
Status: NEW
Alias: CVE-2025-66512
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2420196 2420197 2420198
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-05 17:01 UTC by OSIDB Bzimport
Modified: 2025-12-08 21:36 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-12-05 17:01:48 UTC 
Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Server Enterprise prior to 31.0.12 and 32.0.3, a missing sanitization allowed malicious users to circumvent the content security policy when a malicious user manages to trick a user it viewing an uploaded SVG outside of the Nextcloud Servers web page.
Note You need to log in before you can comment on or make changes to this bug.