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Servers and applications

CVE-2025-66512

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.

Severity
Medium 6.1
Published
5 Dec 2025
Last changed
18 Oct 2026
Added to UpHeron
21 Oct 2026
Fixed in
31.0.12, 32.0.3
Sources
NVD

Affected software

SoftwareAffected versions
NextcloudServers and applications · cpe:a:nextcloud:nextcloud_server
  • From 31.0.0 before 31.0.12
  • From 32.0.0 before 32.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-66512
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66512