CVE-2019-11595: Ublockorigin Ublock Origin

Critical severity, CVSS 9.0. EPSS: 2.4% chance of exploitation in the next 30 days.

In uBlock before 0.9.5.15, the $rewrite filter option allows filter-list maintainers to run arbitrary code in a client-side session when a web service loads a script for execution using XMLHttpRequest or Fetch, and the script origin has an open redirect.

Affected products

• Ublockorigin Ublock Origin: before 0.9.5.15 (fixed in 0.9.5.15)

Published 2019-04-29. Last modified 2026-06-17.