PT-2025-35097 · Formcms · Formcms

Kkc73 + 1 · Published 2025-08-28 · Updated 2025-08-29 · CVE-2025-56236

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions FormCms version 0.5.5

Description FormCms version 0.5.5 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Unrestricted File Upload

Weakness Enumeration

CWE-79

CWE-434

Related Identifiers

CVE-2025-56236

GHSA-4FXF-XGRM-8FCJ

Affected Products

Formcms

References · 8

• 🔥 https://github.com/FormCms/FormCms/issues/27 · Exploit
• 🔥 https://github.com/KKC73/me/blob/main/CVE-2025-56236/README.md · Exploit
• https://osv.dev/vulnerability/CVE-2025-56236 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-4fxf-xgrm-8fcj · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-56236 · Security Note
• https://github.com/formcms/formcms · Note
• https://twitter.com/VulmonFeeds/status/1961231379196190982 · Twitter Post
• https://twitter.com/CVEnew/status/1961085436371370441 · Twitter Post