## Authorization Gap in Netlify Functions Exposes Multiple Endpoints to IDOR Attacks
A critical authorization flaw has been identified across several Netlify functions, allowing users to perform actions on resources they do not own. The vulnerability, classified as Insecure Direct Object Reference (IDOR), affects endpoints that accept resource identifiers—including sheetId, folderId, and noteId—without verifying the authenticated user's ownership or access rights. Security researchers flagged the issue with HIGH severity, warning that attackers who obtain or guess valid resource IDs could manipulate or delete foreign data.

The affected functions span multiple operations within the platform. `deleteProduction.js` permits deletion of any production, while `saveNote.js`, `updateNote.js`, and `deleteNote.js` allow unauthorized modification of notes across any sheet. A code example from `deleteProduction.js` illustrates the problem: the function extracts `sheetId` and `productionCode` from user input but performs the operation without confirming the user owns the target resource. The function executes `drive.files.delete()` targeting a root folder ID with no ownership check. This pattern repeats across the listed functions, creating widespread exposure.

The flaw raises significant risk for systems where resource IDs are predictable or discoverable. An attacker with knowledge of another user's sheet identifiers could alter, save, or erase their data without authentication beyond session access. The vulnerability has been assigned Priority 2 status, signaling it requires near-term remediation. Without explicit authorization verification before each operation, affected endpoints remain open to unauthorized access and data manipulation.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: IDOR vulnerability, authorization flaw, Netlify, web security, data manipulation risk
- **Credibility**: unverified
- **Published**: 2026-05-01 23:54:08
- **ID**: 78927
- **URL**: https://whisperx.ai/en/intel/78927