The provided vulnerability reports and advisories describe an XSS vulnerability in the handling of IFrame URLs for Remote Apps, but they do not disclose specific function names or file paths. While the root cause is clearly improper input sanitization of the IFrame URL parameter, the lack of available commit diffs, patch details, or code examples makes it impossible to identify exact vulnerable functions with high confidence. The vulnerability likely resides in the code responsible for rendering or processing Remote App IFrame URLs, but insufficient technical implementation details are provided to pinpoint specific functions.