What’s Vulnerable › Vulnerabilities

CVE-2019-11595

• Severity: critical (CVSS 9.0 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-29 · updated 2026-06-17
• Weakness: CWE-20

Description

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

How to fix

Upgrade to a fixed version: Ublockorigin Ublock Origin 0.9.5.15. Check the vendor advisory for mitigations.

References

• https://armin.dev/blog/2019/04/adblock-plus-code-injection/
• https://news.ycombinator.com/item?id=19666504
• https://armin.dev/blog/2019/04/adblock-plus-code-injection/
• https://news.ycombinator.com/item?id=19666504

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