Chuck 16f0702c0c fix: Harden upload flow - HTTP status check, path normalization, property assignment ...

Fix three security and reliability issues in upload flow:

1. Check HTTP status before calling response.json():
   - Prevents JSON parsing errors on non-2xx responses
   - Properly handles error responses with status codes
   - Returns error text if available for better debugging
   - Prevents masking of HTTP errors

2. Normalize uploadedFile.path before using in img src:
   - Remove leading slashes with replace(/^\/+/, '')
   - Add single leading slash for image src
   - Prevents //host/odd paths that could cause security issues
   - Ensures consistent path format

3. Replace string-based handlers with property assignment:
   - Replace setAttribute('onchange', ...) with addEventListener('change', ...)
   - Replace setAttribute('onclick', ...) with addEventListener('click', ...)
   - Refactor addCustomFeedRow to use DOM manipulation instead of innerHTML
   - Prevents injection vulnerabilities from string interpolation
   - Uses property assignment (img.src, input.name, input.value) instead of setAttribute where appropriate

These changes improve security by eliminating XSS injection surfaces
and improve reliability by properly handling HTTP errors and path formats.

2026-01-11 14:22:31 -05:00

306 KiB

Raw Blame History

View Raw