CVE-2014-3146

python-lxml: clean_html input sanitization flaw

Published May 14, 2014 CVSS 3.1 · 6.1 Medium EPSS 6.3% KEV · Not listed
Description
Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-1604-1 lxml security update
Debian DSA Debian DSA DSA-2941-1 lxml security update
EUVD EUVD EUVD-2014-0033 Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.
Github GHSA Github GHSA GHSA-57qw-cc2g-pv5p lxml Cross-site Scripting Via Control Characters
Ubuntu USN Ubuntu USN USN-2217-1 lxml vulnerability
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics epss

{'score': 0.06721}

epss

{'score': 0.08192}

Type Values Removed Values Added
Metrics epss

{'score': 0.14779}

epss

{'score': 0.06721}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Dec 17, 2025, 9:03 PM
Reserved
May 2, 2014, 12:00 AM
Status
Modified
Published
May 14, 2014, 7:55 PM
Modified
Jun 17, 2026, 12:07 AM
Severity
Low
Public date
Apr 15, 2014, 12:00 AM