Highlights
Access Control: 5 prior fixes. Scrutinize any change in this area.
contracts/StandardToken.sol: most-fixed (4 issues). Treat as high-risk during review.
11 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: Arbitrary external calls could be executed through the recipient of token transfers because of insecure standard implementations (ERC-827), allowing attackers to execute arbitrary contracts under the identity of the token interface.
Auth Bypass: Bypassing verification structures occurred when validation checks were executed exclusively on internal utilities instead of on public user-facing entry points (transfer and transferFrom).
Logic Error: Argument sequence mismatches in key pricing and cap validation methods caused internal metrics to evaluate improperly, risking incorrect price calculations and crowdsale limit bypasses.