TI-2025-35182 Aliases CVE-2025-55797 GHSA-6cwx-42hw-w69c

An improper access control vulnerability in FormCms v0.5.4 in the…

LOW 29CWE-284Published 2025-09-30 · Updated 2025-10-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass, Information disclosure
Confidentiality · integrity · availability: Low · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-284 and CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00328 26th percentileScored 2026-11-07

Fix Fixed FormCMS (NuGet): 0.5.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA
—	FormCMS (NuGet)	before 0.5.5	0.5.5	Patch available	GHSA-6cwx-42hw-w69c

— Vendor— Affected all versions Fixed in — No fix listed CNA
FormCMS (NuGet) Vendor— Affected before 0.5.5 Fixed in 0.5.5 Patch available GHSA-6cwx-42hw-w69c

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:formcms:formcms:0.5.4:::::::*	0.5.4	Vulnerable	Formcms

cpe:2.3:a:formcms:formcms:0.5.4:*:*:*:*:*:*:* Versions 0.5.4 Vulnerable ·Formcms

Remediation

Fix · GHSA-6cwx-42hw-w69c FormCMS (NuGet) Fixed in 0.5.5 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-55797
2026-10-03 Alias added: GHSA-6cwx-42hw-w69c

References

Advisory 2

Other 3

TI-2025-35286 FormCms v0.5.5 contains a stored cross-site scripting (XSS) vulnerability in the avatar… CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences