xss

[pawvan]

The injectScript function contains potential security risks and error handling issues:

XSS Vulnerability:

Issue: The use of eval within the injectScript function can execute arbitrary JavaScript code, leading to a potential XSS (Cross-Site Scripting) vulnerability. Despite sanitization attempts (e.g., replacing </script>), eval remains a security risk.
Details: Dynamic execution of JavaScript via eval can allow for malicious inputs to be executed, posing a significant security threat.
Error Handling:

Issue: The try-catch block is used to handle errors, but the error message in the catch block is not sufficiently informative. Additionally, console.log is used, which may not be visible or effective for all testing scenarios.
Details: Enhancing error handling to provide more informative feedback and improve visibility would be beneficial.
Proposed Solution
Improve Security:

Solution: Avoid using eval for executing dynamic scripts. Consider safer alternatives, such as using predefined functions or secure libraries for executing dynamic logic.
Enhance Error Handling:

Solution: Improve error handling by providing more detailed error messages and using appropriate logging or notification mechanisms. Consider using console.error for better visibility of errors.
Code Snippet
Here is the current implementation:

typescript
Copy code
export async function injectScript(page: Page, script: string):Promise {
let safeScript = script.replace(/</script>/g, '<\/script>');
return await page.setContent(`

<script> async function main() { try{ const amount = eval(${JSON.stringify(safeScript)}); document.querySelector('div').textContent = amount; } catch(error){ console.log('Script error:', error); document.querySelector('div').textContent = "error executing script"; } } main(); </script>

`); }