The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited integrity, and availability (service disruption) for affected systems. Impacting 12 products from python, 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.
2021-02-15T13:15:12.433
2025-12-17T22:15:55.923
Modified
CVSSv3.1: 5.9 (MEDIUM)
AV:N/AC:H/Au:N/C:N/I:P/A:P
4.9
4.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | python | python | < 3.6.13 | Yes |
| Application | python | python | < 3.7.10 | Yes |
| Application | python | python | < 3.8.8 | Yes |
| Application | python | python | < 3.9.2 | Yes |
| Operating System | fedoraproject | fedora | 32 | Yes |
| Operating System | fedoraproject | fedora | 33 | Yes |
| Operating System | fedoraproject | fedora | 34 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Application | netapp | cloud_backup | - | Yes |
| Application | netapp | inventory_collect_tool | - | Yes |
| Application | netapp | ontap_select_deploy_administration_utility | - | Yes |
| Application | netapp | snapcenter | - | Yes |
| Application | djangoproject | django | < 2.2.19 | Yes |
| Application | djangoproject | django | < 3.0.13 | Yes |
| Application | djangoproject | django | < 3.1.7 | Yes |
| Application | oracle | communications_offline_mediation_controller | 12.0.0.3.0 | Yes |
| Application | oracle | communications_pricing_design_center | 12.0.0.3.0 | Yes |
| Application | oracle | enterprise_manager_ops_center | 12.4.0.0 | Yes |
| Operating System | oracle | zfs_storage_appliance | 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 python'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.