Highlights
Access Control: 5 prior fixes. Scrutinize any change in this area.
contracts/optimism/L2ERC20ExtendedTokensBridge.sol: most-fixed (3 issues). Treat as high-risk during review.
8 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.
Access Control: burn used msg.sender instead of _from, allowing unauthorized burning of arbitrary users' tokens.
Access Control: Public initialize functions allowed anyone to take over bridge admin roles.
Access Control: Public initialize functions allowed anyone to modify token metadata.