Medium severity · published Aug 28, 2025
CVE-2025-56236
FormCms v0.5.5 contains a stored cross-site scripting (XSS) vulnerability in the avatar upload feature
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Formcms · Formcms
0.5.5 before 0.5.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-56236
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-56236
Exploit
https://github.com/FormCms/FormCms/issues/27
Third Party Advisory
https://github.com/KKC73/me/blob/main/CVE-2025-56236/README.md
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