Highlights
Cross-Site Scripting (XSS): 2 prior fixes. Scrutinize any change in this area.
BootstrapFlashHelper: most-fixed (2 issues). Treat as high-risk during review.
2 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.
Cross-Site Scripting (XSS): Repeated occurrences of unescaped rendering of flash message contents within the helper allowed execution of arbitrary script in the user's browser session. This was caused by bypasses like calling `.html_safe` on dynamic inputs inside view helpers.