Highlights
DOM-based XSS: 1 prior fix. Scrutinize any change in this area.
client/karma.js: most-fixed (2 issues). Treat as high-risk during review.
0 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Open Redirect: Inadequate validation of the `return_url` parameter allowed arbitrary redirection to untrusted destinations because the validation scheme trusted generic HTTP/HTTPS schemes without checking the destination host.
DOM-based XSS: Assigning unvalidated user input directly to browser location APIs (`location.href`) allowed execution of malicious javascript: schemes in the victim's browser context.