CVE-2025-66512

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CVSS 3.1

6.1 medium

EPSS

<1%p20

Published

Dec 5, 2025 (Dec 5, 2025)

Modified

Jun 17, 2026

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.

Vendors: nextcloud
Products: nextcloud server
Weakness: CWE-80, CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.3%)

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