CVE-2019-11593: In Adblock Plus before 3.5.2, the $rewrite filter option allows filter-list maintainers to run arbitrary code

Q: How do I fix CVE-2019-11593?

adblock plus: upgrade to 3.5.2. Exact commands for each OS are on this page.

Q: Is CVE-2019-11593 being exploited?

CVE-2019-11593 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-11593 affect?

CVE-2019-11593 affects adblock plus. Severity is high (CVSS 8.1). In Adblock Plus before 3.5.2, 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

Q: How urgent is CVE-2019-11593?

Priority 55/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.1REMOTEUPGRADE

CVE-2019-11593 is a high-severity flaw (CVSS 8.1) affecting adblock plus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Adblock Plus before 3.5.2, 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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-94
Published	2019-04-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: adblockplus

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-04-29 15:29 UTCPublished CVE record published
2026-06-17 02:13 UTCUpdated Record last modified

adblockplus adblock plus UPGRADE

Affected: < 3.5.2

Fixed in: 3.5.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy adblock-plus || rpm -q adblock-plus || adblock-plus --version

2. UPGRADE to 3.5.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade adblock-plus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade adblock-plus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-11593?

adblock plus: upgrade to 3.5.2. Exact commands for each OS are on this page.

Is CVE-2019-11593 being exploited?

CVE-2019-11593 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-11593 affect?

CVE-2019-11593 affects adblock plus. Severity is high (CVSS 8.1). In Adblock Plus before 3.5.2, 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

How urgent is CVE-2019-11593?

Priority 55/100. High severity; Remotely exploitable, no login, no user action

References

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