CVE-2025-55797 FormCMS has an improper access control vulnerability in the /api/schemas/history/[schemaId] endpoint
Unauthenticated attackers can access historical schema data in FormCms by guessing valid schema IDs due to improper access control.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-55797?
CVE-2025-55797 is a medium-severity missing authorization vulnerability in n/a, published on 30 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-284
Which versions are affected by CVE-2025-55797?
2 open source packages ship an affected version, including FormCMS. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
FormCMS NuGet | All versions | 0.5.5 |
FormCMS NuGet | All versions | 0.5.5 |
Products include Formcms Formcms.
How do I fix CVE-2025-55797?
Upgrade FormCMS to 0.5.5 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-55797 being exploited?
There is no known exploitation of CVE-2025-55797 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-6cwx-42hw-w69c.