The provided commit diff and vulnerability details focus on Content Security Policy (CSP) configuration changes (e.g., adding 'exclude_paths' and modifying CSP directives). While these changes mitigate the XSS vulnerability by enforcing stricter CSP policies, the root cause of the stored XSS lies in the Tooltip feature's input handling code, which is not included in the provided diff. The actual vulnerable function(s) responsible for rendering/processing Tooltip content without proper input sanitization are not visible in the analyzed materials. Therefore, no specific functions can be identified with high confidence based on the provided data.