Read about the threat: https://armin.dev/blog/2019/04/adblock-plus-code-injection/
and from ABP: https://adblockplus.org/blog/potential-vulnerability-through-the-url-rewrite-filter-option
ABP users should use uBlock Origin adblocker as it is not vulnerable,
as it does not support the $rewrite filter option.
Re: https://github.com/gorhill/uBlock/
Furthermore the the exploit can be mitigated in the affected web services by whitelisting known origins
using the connect-src CSP header, or by eliminating server-side open redirects.
I use uBlock Origin in combination with a script blocker like uMatrix.
I won’t refrain from ad- and script-blocking in the light of potentially malcious web content. 
polonus (volunteer 3rd party cold reconnaissance website security analyst and website error-hunter)