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Advisory record · GHSA-6cwx-42hw-w69c

FormCMS has an improper access control vulnerability in the /api/schemas/history/[schemaId] endpoint

CVSS 6.5 MediumEPSS 0.0033 · 26th percentile

Published by the GitHub Advisory Database at 30 Sept 2025, 18:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
FormCMSNuGet<0.5.50.5.5
Identifiers
GHSA-6cwx-42hw-w69c · CVE-2025-55797
Weakness (CWE)
CWE-200 · CWE-284
Tags
Published
30 Sept 2025
Updated
30 Sept 2025

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

FormCMS versions before 0.5.5 have an improper access control flaw in the /api/schemas/history/[schemaId] endpoint. An unauthenticated attacker who knows or guesses a valid schemaId can access historical schema data. Upgrade FormCMS to version 0.5.5 or later.

Written 9 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.0033, the 26th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:22 UTC First seen by agentprime
  2. 31 Oct 2026, 15:22 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.