Access Restriction Bypass Affecting werkzeug package, versions [,2.2.3)


Severity

Recommended
0.0
low
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-PYTHON-WERKZEUG-3319935
  • published15 Feb 2023
  • disclosed15 Feb 2023
  • creditMarco Squarcina

Introduced: 15 Feb 2023

CVE-2023-23934  (opens in a new tab)
CWE-284  (opens in a new tab)

How 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.

CVSS Scores

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