CVE-2011-3744

HTML Purifier allows remote attackers to obtain sensitive information

5.0 Medium

HTML Purifier 4.2.0 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by tests/PHPT/Reporter/SimpleTest.php and certain other files.

Exploit likelihood

1.37%Up 0.2 points since Feb 4, 2022

What each source reports

NVD Score used 5.0

Record: CVE-2011-3744
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-3744
Updated: 2026-11-02

EUVDEUVD-2022-4441 No score

Record: EUVD-2022-4441
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jw86-5cjf-mv79 6.9

HTML Purifier allows remote attackers to obtain sensitive information

Record: GHSA-jw86-5cjf-mv79
CVSS 4.0: 6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSVGHSA-jw86-5cjf-mv79 6.9

HTML Purifier allows remote attackers to obtain sensitive information

Record: GHSA-jw86-5cjf-mv79
CVSS 4.0: 6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSVUBUNTU-CVE-2011-3744 No score

Record: UBUNTU-CVE-2011-3744
Updated: 2026-11-02

Affected products

htmlpurifier html purifier

Affected packages

Affected packages
Package	Affected	Fixed
`ezyang/htmlpurifier` Packagist	through 4.2.0	None known
`php-htmlpurifier` Ubuntu:16.04:LTS	All versions, plus listed versions 4.6.0-14.7.0-14.7.0-1build1	None known
`php-htmlpurifier` Ubuntu:18.04:LTS	All versions, plus listed versions 4.7.0-2	None known
`php-htmlpurifier` Ubuntu:20.04:LTS	All versions, plus listed versions 4.10.0-14.11.0-1	None known
`php-htmlpurifier` Ubuntu:22.04:LTS	All versions, plus listed versions 4.11.0-1	None known
`php-htmlpurifier` Ubuntu:24.04:LTS	All versions, plus listed versions 4.11.0-14.11.0-2	None known
`php-htmlpurifier` Ubuntu:25.10	All versions, plus listed versions 4.11.0-2	None known
`php-htmlpurifier` Ubuntu:26.10	All versions, plus listed versions 4.11.0-2build1	None known
`php-htmlpurifier` Ubuntu:26.04:LTS	All versions, plus listed versions 4.11.0-24.11.0-2build1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-3744 is a medium vulnerability (CVSS 5.0) in Htmlpurifier Html Purifier, published September 23, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.37%, the 72nd percentile. No source names a fixed version.