CVE-2025-56236CWE-79cross-site-scripting

CVE-2025-56236

Medium · published August 28, 2025

CVSS v3.1
6.1
EPSS
0%
Percentile
10.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00212 · 10.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2025-08-28T19:16Z
Affected products (1)
ProductVersionsFixed in
formcms/formcms≥ 0.5.5, < 0.5.70.5.7
References (2)
https://github.com/FormCms/FormCms/issues/27 · [email protected]https://github.com/KKC73/me/blob/main/CVE-2025-56236/README.md · [email protected]
EPSS history
Timeline
  • 28 AUG 00:00Z
    FormCms v0.5.5 contains a stored cross-site scripting (XSS) vulnerability in the avatar upload feature
    cvelistv5