CWE-181 — Incorrect Behavior Order: Validate Before Filter
CWE-181: Incorrect Behavior Order: Validate Before Filter
MITRE CWE weakness
| Kind | Weakness |
| Abstraction | Variant |
| Status | Draft |
| Likelihood of exploit | — |
Description
The product validates data before it has been filtered, which prevents the product from detecting data that becomes invalid after the filtering step.
This can be used by an attacker to bypass the validation and launch attacks that expose weaknesses that would otherwise be prevented, such as injection.
Common consequences
- Access Control: Bypass Protection Mechanism
Mitigations
Implementation — Inputs should be decoded and canonicalized to the application's current internal representation before being filtered.
References
- CWE page: https://cwe.mitre.org/data/definitions/181.html
- CWE list: https://cwe.mitre.org/data/index.html