Highlights
Code Injection: 2 prior fixes. Scrutinize any change in this area.
Library/Think/App.php: most-fixed (2 issues). Treat as high-risk during review.
3 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.
Code Injection: Arbitrary class instantiation via controller name leads to remote code execution; two separate fixes were needed, indicating incomplete coverage on sibling paths.
Reflected XSS: Exception parameter keys are reflected into HTML without encoding, enabling script injection in error pages.
Session Fixation: Unvalidated session IDs allow attackers to set arbitrary identifiers, enabling session fixation attacks.