Access Restriction Bypass Affecting werkzeug package, versions [,2.2.3)
Snyk CVSS
Attack Complexity
High
User Interaction
Required
Threat Intelligence
EPSS
0.05% (19th
percentile)
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Test your applications- Snyk ID SNYK-PYTHON-WERKZEUG-3319935
- published 15 Feb 2023
- disclosed 15 Feb 2023
- credit Marco Squarcina
Introduced: 15 Feb 2023
CVE-2023-23934 Open this link in a new tabHow to fix?
Upgrade werkzeug to version 2.2.3 or higher.
Overview
Affected versions of this package are vulnerable to Access Restriction Bypass that allows a malicious application on an adjacent subdomain to present "nameless" cookies that look like =value instead of key=value and have them accepted by the affected browser. For example, a cookie like =__Host-test=bad would be parsed as __Host-test=bad and the key treated as valid while the value is ignored.