Common Weakness Enumeration
CWE Definition / CWE-87
CWE-87: Improper Neutralization of Alternate XSS Syntax
The product does not neutralize or incorrectly neutralizes user-controlled input for alternate script syntax.
Published:19 Jul 2006
Organization:MITRE
Modified:11 Dec 2025
Related Weakness
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
