Weakness · High
CWE-603: Use of Client-Side Authentication
What it is
A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.
- Severity (our rating)
- High
- Likelihood of exploit
- Not rated by MITRE
- Introduced during
- Architecture and Design, Implementation
- Exploited in the wild
- No CVE in CISA's catalog
In more detail
Client-side authentication is extremely weak and may be breached easily. Any attacker may read the source code and reverse-engineer the authentication mechanism to access parts of the application which would otherwise be protected.
What an attacker can do
- Bypass Protection Mechanism (Access Control)
- Gain Privileges or Assume Identity (Access Control)
How to prevent it
Architecture and Design
- Do not rely on client side data. Always perform server side authentication.
H2 Security
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Start freeSource: MITRE Common Weakness Enumeration, CWE version 4.19.1. CWE is a trademark of The MITRE Corporation.