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EUVD-2026-263211

fkie_cve-2025-67718

Form.io is a combined Form and API platform for Serverless applications. Versions 3.5.6 and below and 4.0.0-rc.1 through 4.4.2 contain a flaw in path handling which could allow an attacker to access protected API endpoints by sending a crafted request path. An unauthenticated or unauthorized request could retrieve data from endpoints that should be protected. This issue is fixed in versions 3.5.7 and 4.4.3.

GHSA-m654-769v-qjv7 — Formio improperly authorized permission elevation through specially crafted request path

Affected: npm: formio

# Security Advisory: Unauthorized permission elevation through specially crafted request path

**Summary:** A flaw in path handling could allow an attacker to access protected API endpoints by sending a crafted request path. This issue could result in unauthorized data disclosure under certain configurations.

**Impact:** In affected configurations, an unauthenticated or unauthorized request could retrieve data from endpoints that should be protected.

**Affected versions:** <= 3.5.6 <= 4.4.2

**Fixed in:** 3.5.7 4.4.3

**Mitigation / Workarounds:** Upgrade to 3.5.7 or later.

**Disclosure timeline:** Discovered 2025-05-22; fixed 2025-05-30; publicly disclosed 2025-12.