Improper Access Control Affecting flask-cors package, versions [4.0.0,5.0.0)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Proof of concept
    EPSS
    0.08% (37th percentile)

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  • Snyk ID SNYK-PYTHON-FLASKCORS-7707876
  • published 19 Aug 2024
  • disclosed 18 Aug 2024
  • credit tomorrowisnew_

How to fix?

Upgrade Flask-Cors to version 5.0.0 or higher.

Overview

Flask-Cors is an A Flask extension adding a decorator for CORS support

Affected versions of this package are vulnerable to Improper Access Control due to the default configuration of the Access-Control-Allow-Private-Network CORS header. An attacker can expose private network resources to unauthorized external access by leveraging this default setting.

CVSS Scores

version 4.0
version 3.1
Expand this section

Snyk

Recommended
7.1 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Attack Requirements (AT)
    None
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Passive
  • Confidentiality (VC)
    High
  • Integrity (VI)
    None
  • Availability (VA)
    None
  • Confidentiality (SC)
    None
  • Integrity (SI)
    None
  • Availability (SA)
    None