CVE-2025-66512
05.12.2025, 17:16
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.
| Vendor | Product | Version |
|---|---|---|
| nextcloud | nextcloud_server | 31.0.0 ≤ 𝑥 < 31.0.12 |
| nextcloud | nextcloud_server | 31.0.0 ≤ 𝑥 < 31.0.12 |
| nextcloud | nextcloud_server | 32.0.0 ≤ 𝑥 < 32.0.3 |
| nextcloud | nextcloud_server | 32.0.0 ≤ 𝑥 < 32.0.3 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)The software receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.