CVE-2025-56236

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 v4.0

6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.21% chance of exploitation in the next 30 days, 11th percentile

Published

2025-08-28

Proof-of-concept exploits (1)

• FormCms/FormCms/issues/27

References

• CVE Record
• NVD entry

Related

• CVE-2025-5623
• CVE-2025-5624
• CVE-2025-5622
• CVE-2025-56241
• CVE-2025-5621
• CVE-2025-5625