The new Link Fixer plugin for WordPress uses the Wayback Machine to prevent dead links, keeping old posts and references accessible for readers.
A popular WordPress quiz plugin can be abused to mount SQL injection attacks ...
Google's crawl team filed a bug against WooCommerce for add-to-cart parameters wasting crawl budget. WooCommerce fixed it. Other plugins haven't.
This proposal is complete and already merged into ECMA262 specification. See the specification text here. Thanks for help and feedback on this effort from Brendan Eich, Waldemar Horwat, Jaro Sevcik, ...