Medium severity6.1NVD Advisory· Published Aug 28, 2025· Updated Jun 17, 2026
CVE-2025-56236
CVE-2025-56236
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
FormCMSNuGet | < 0.5.7 | 0.5.7 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/FormCms/FormCms/issues/27nvdExploitIssue TrackingWEB
- github.com/KKC73/me/blob/main/CVE-2025-56236/README.mdnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-4fxf-xgrm-8fcjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-56236ghsaADVISORY
News mentions
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