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.
CVSS 3.1MEDIUM 6.5·Network·No auth·No interaction·EPSS 0.00328·Published 2025-09-30·Fixed in 0.5.5CWE-284