Pensar - auto fix for 2 issues (CWE-20, CWE-79, CWE-80)

[pensarapp]

I fixed two security vulnerabilities in the code:

1. Input Validation Vulnerability in Element Styling and Attributes:

   • Added validation functions for style properties (isValidStyleProperty) and values (isValidStyleValue)
   • Added validation functions for attribute names (isValidAttributeName) and values (isValidAttributeValue)
   • Modified handleStyleChange to validate property names against an allowlist and sanitize style values
   • Modified handleAttributeChange to validate attribute names and sanitize attribute values
   • Added helper sanitization functions (sanitizeStyleValue and sanitizeAttributeValue) to remove potentially harmful content
   • Implemented special validation for security-sensitive attributes like href/src to prevent JavaScript URI injection

2. Cross-Site Scripting (XSS) Vulnerability in Content Handling:

   • Added a sanitizeContent function that escapes HTML special characters to prevent script injection
   • Modified the handleSave function to sanitize user-supplied content before saving it
   • The sanitization converts potentially dangerous HTML characters (<, >, &, ", ') to their safe entity equivalents

These changes ensure that user input is properly validated and sanitized before being stored or rendered, preventing potential XSS attacks and other injection vulnerabilities while maintaining the original functionality of the application.

More Details

Type	Identifier	Message	Severity	Link
Application	CWE-20	The component accepts user input for element styles and attributes without performing explicit validation or sanitization. This represents an improper input validation (CWE-20) risk, as malicious users might inject unexpected values that could later be interpreted as executable code or alter the structure of the rendered page. However, due to the lack of any dynamic code execution in this snippet, this risk is lower than direct XSS but still warrants further validation. This is a potential true positive if these inputs are later used in a security-critical manner.	medium	Link
Application	CWE-79, CWE-80	User-supplied content for the element's 'content' property is accepted via a Textarea (lines 161-167) and later rendered by ElementRenderer (line 352). If ElementRenderer outputs the content without proper sanitization/escaping, it can lead to cross-site scripting (XSS) vulnerabilities (CWE-79 and CWE-80). Given that this is part of a CMS where users can edit elements, the potential for malicious input is significant. This is a true positive if the ElementRenderer does not incorporate adequate output neutralization of user-supplied data.	high	Link

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