Token Horizontal Privilege Escalation

Horizontal Privilege Escalation happen when a user can access another users resources. Usually this vulnerability is exploited by tampering with the user identifier in the token.

Remediation

Do not use easily guessable or public user identifier
Check the authenticated session is authorised to access a requested resource

Metadata

Severity: high
Slug: token-horizontal-privilege-escalation

CWEs

639: Authorization Bypass Through User-Controlled Key
266: Incorrect Privilege Assignment

OWASP

A01:2021: Broken Access Control
A04:2021: Insecure Design
A07:2021: Identification and Authentication Failures

Available Labs

Open Python labs in SecDim Play for this vulnerability.

medium

Bad token.py

Python Medium FastAPI Signature

easy

Subaru.py

Python Easy FastAPI

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