Improper Verification of Source of a Communication Channel Affecting flask-cors package, versions [0,]
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-FLASKCORS-9668953
- published7 Apr 2025
- disclosed20 Mar 2025
- credittomorrowisnew_
Introduced: 20 Mar 2025
NewCVE-2024-6839 (opens in a new tab)How to fix?
There is no fixed version for Flask-Cors.
Overview
Flask-Cors is an A Flask extension adding a decorator for CORS support
Affected versions of this package are vulnerable to Improper Verification of Source of a Communication Channel due to improper application of regex path matching rules. An attacker can gain unauthorized cross-origin access to sensitive data or functionality by exploiting the prioritization of longer regex patterns over more specific ones, leading to less restrictive CORS policies being applied to sensitive endpoints.