Detections
Analytics
CVE-2025-66512
medium
Description
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.
References
https://hackerone.com/reports/3357808
https://github.com/nextcloud/viewer/pull/3023
https://github.com/nextcloud/viewer/commit/5044a27d61bc40c0f134298d36af91f865335b63
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qcw2-p26m-9gc5