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CVE-2021-23385

Open Redirect

Published: Aug 2, 2022Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-601
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.9%
Top 45.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

Description

This affects all versions of package Flask-Security. When using the get_post_logout_redirect and get_post_login_redirect functions, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False. **Note:** Flask-Security is not maintained anymore.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-601

Affected Products

flask-securityflask-security project
Library
OSS Libraries / web-framework
Flask-Securityn/a
Flask-SecurityPyPIOSS Libraries
flask-security projectoss-projectOSS Librariesaka flask-security
pypipackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/mattupstate/flask-security
github.com
https://lists.debian.org/debian-lts-announce/2023/08/msg00034.html
lists.debian.org
https://security.snyk.io/vuln/SNYK-PYTHON-FLASKSECURITY-1293234
security.snyk.io
and 3 more references View all →

Timeline

Published
Aug 2, 2022
Last Updated
Nov 21, 2024

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