medium6.9
CVE-2025-56236
FormCms avatar upload feature has a stored cross-site scripting (XSS) vulnerability
Impact
FormCms v0.5.5 contains a stored cross-site scripting (XSS) vulnerability in the avatar upload feature. Authenticated users can upload .html files containing malicious JavaScript, which are accessible via a public URL. When a privileged user accesses the file, the script executes in their browser context.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | FormCMS | < 0.5.7 | 0.5.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Formcms | Formcms | from 0.5.5 before 0.5.7 |