Vulnerability in Formcms
CVE-2025-55797
An improper access control vulnerability in FormCms v0.5.4 in the /api/schemas/history/[schemaId] endpoint allows unauthenticated attackers to access historical schema data if a valid schemaId is known or guessed.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (23.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Formcms — versions 0.5.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/FormCms (Product)
- github.com/FormCms/FormCms (Product)
- github.com/KKC73/me/tree/main/CVE-2025-55797 (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-55797?
- CVE-2025-55797 is a medium-severity vulnerability in Formcms, classified under Improper Access Control. CVSS score: 6.5/10. Published 2025-09-30.
- How severe is CVE-2025-55797?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-55797 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.