Highlights
Auth Bypass: 90 prior fixes. Scrutinize any change in this area.
core/src/main/java/hudson/FilePath.java: most-fixed (10 issues). Treat as high-risk during review.
76 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.
Auth Bypass: Allowing authenticated users to load raw resources from the main domain bypasses security realm isolation, risking cross-site scripting and privilege escalation. Access must be restricted strictly to anonymous sessions.
Path Traversal: Unsafe handling of symbolic links and canonical paths during archive extraction (tar/zip) and relative path validation can allow attackers to read or write files outside the intended workspace boundaries.
Deserialization of Untrusted Data: Deserializing XML formats without explicit class filtering or blocklists allows instantiation of arbitrary types such as JRuby proxies, leading to remote code execution.