PHP package security

Is ezyang/htmlpurifier vulnerable?

Q: Does ezyang/htmlpurifier have known vulnerabilities?

Yes. Packagist lists 4 security advisories for ezyang/htmlpurifier (4 medium severity). The most recent, reported 2022-05-17, is "HTML Purifier allows remote attackers to obtain sensitive information". The newest release, 4.19.1, is outside every affected range.

Q: Which version of ezyang/htmlpurifier should I run?

The newest stable release is 4.19.1 (published 2026-09-15). Run composer update ezyang/htmlpurifier, then composer audit to confirm nothing else is flagged.

Q: How do I check if my ezyang/htmlpurifier version is affected?

Run composer show ezyang/htmlpurifier in your project to see the installed version, then enter it in the version check on this page. You can also run composer audit, which reads the same Packagist advisory data for every package in your composer.lock.

4 known security advisories for ezyang/htmlpurifier. The latest was reported on 2022-05-17 and names no fixed version. The newest release, 4.19.1, is not affected by any of them.

4 medium

Known advisories: 4
Newest release: 4.19.1
Released: 2026-09-15
Affecting newest release: 0
Last synced: 2026-11-03

Standards compliant HTML filter written in PHP · packagist.org/packages/ezyang/htmlpurifier

Check your version

Run composer show ezyang/htmlpurifier in your project to see the installed version, then enter it here.

Security advisories for ezyang/htmlpurifier

Newest first. “Affected” is the Composer version constraint from the advisory; “fixed in” is each version the advisory names as the first safe one on its release line.

Reported	Advisory	Severity	Affected	Fixed in
2022-05-17	HTML Purifier allows remote attackers to obtain sensitive information GHSA-jw86-5cjf-mv79 · CVE-2011-3744 · GitHub	medium	<=4.2.0	not stated
2022-05-01	HTML Purifier Cross-site Scripting vulnerability GHSA-6fh7-fwqj-mv49 · CVE-2007-3498 · GitHub	medium	<2.0.1	2.0.1
2010-06-01	XSS vulnerability exploitable on Internet Explorer CVE-2010-2479 · FriendsOfPHP/security-advisories, GitHub	medium	<4.1.1	4.1.1
2010-04-26	Multiple XSS vulnerabilities exploitable on Internet Explorer CVE-2010-4183 · FriendsOfPHP/security-advisories, GitHub	medium	<4.1.0	4.1.0

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Questions about ezyang/htmlpurifier

Does ezyang/htmlpurifier have known vulnerabilities?

Yes. Packagist lists 4 security advisories for ezyang/htmlpurifier (4 medium severity). The most recent, reported 2022-05-17, is "HTML Purifier allows remote attackers to obtain sensitive information". The newest release, 4.19.1, is outside every affected range.

Which version of ezyang/htmlpurifier should I run?

The newest stable release is 4.19.1 (published 2026-09-15). Run composer update ezyang/htmlpurifier, then composer audit to confirm nothing else is flagged.

How do I check if my ezyang/htmlpurifier version is affected?

Run composer show ezyang/htmlpurifier in your project to see the installed version, then enter it in the version check on this page. You can also run composer audit, which reads the same Packagist advisory data for every package in your composer.lock.

Where this data comes from

Advisories come from the Packagist security advisories API, which collects the GitHub Advisory Database and the FriendsOfPHP security advisories. composer audit reads the same data. Releases come from packagist.org. Last synced 2026-11-03; we re-check daily. Each advisory links to its source. Spot an error? Tell us.

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