A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-2467-1 lxml security update
Debian DLA Debian DLA DLA-2467-2 lxml regression update
Debian DSA Debian DSA DSA-4810-1 lxml security update
EUVD EUVD EUVD-2020-0102 A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.
Github GHSA Github GHSA GHSA-pgww-xf46-h92r lxml vulnerable to Cross-site Scripting
Ubuntu USN Ubuntu USN USN-4666-1 lxml vulnerability
Ubuntu USN Ubuntu USN USN-4666-2 lxml vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 17 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-12-17T21:02:06.822Z

Reserved: 2020-10-27T00:00:00.000Z

Link: CVE-2020-27783

cve-icon Vulnrichment

Updated: 2024-08-04T16:25:42.427Z

cve-icon NVD

Status : Modified

Published: 2020-12-03T17:15:13.177

Modified: 2025-12-17T21:15:52.560

Link: CVE-2020-27783

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-10-18T00:00:00Z

Links: CVE-2020-27783 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses