lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.2, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, integrity (unauthorized modifications), for affected systems. Impacting 12 products from lxml, from fedoraproject, from debian and 9 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2021-12-13T18:15:08.387
2024-11-21T06:29:51.497
Modified
CVSSv3.1: 8.2 (HIGH)
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | lxml | lxml | < 4.6.5 | Yes |
| Operating System | fedoraproject | fedora | 34 | Yes |
| Operating System | fedoraproject | fedora | 35 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Operating System | debian | debian_linux | 10.0 | Yes |
| Operating System | debian | debian_linux | 11.0 | Yes |
| Application | netapp | solidfire | - | Yes |
| Application | netapp | solidfire_enterprise_sds | - | Yes |
| Operating System | netapp | hci_storage_node_firmware | - | Yes |
| Hardware | netapp | hci_storage_node | - | No |
| Application | oracle | communications_cloud_native_core_binding_support_function | 22.1.3 | Yes |
| Application | oracle | communications_cloud_native_core_network_exposure_function | 22.1.1 | Yes |
| Application | oracle | communications_cloud_native_core_policy | 22.2.0 | Yes |
| Application | oracle | http_server | 12.2.1.3.0 | Yes |
| Application | oracle | http_server | 12.2.1.4.0 | Yes |
| Application | oracle | zfs_storage_appliance_kit | 8.8 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For lxml's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.