CWE-692 - Incomplete Denylist to Cross-Site Scripting
- Abstraction:Compound
- Structure:Chain
- Status:Draft
- Release Date:2008-04-11
- Latest Modification Date:2023-06-29
Weakness Name
Incomplete Denylist to Cross-Site Scripting
Description
The product uses a denylist-based protection mechanism to defend against XSS attacks, but the denylist is incomplete, allowing XSS variants to succeed.
While XSS might seem simple to prevent, web browsers vary so widely in how they parse web pages, that a denylist cannot keep track of all the variations. The "XSS Cheat Sheet" [REF-714] contains a large number of attacks that are intended to bypass incomplete denylists.
Common Consequences
Scope: Confidentiality, Integrity, Availability
Impact: Execute Unauthorized Code or Commands
