6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
36.2%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | flask-security | < any | UNKNOWN |
ubuntu | 20.04 | noarch | flask-security | < any | UNKNOWN |
ubuntu | 22.04 | noarch | flask-security | < any | UNKNOWN |
ubuntu | 23.10 | noarch | flask-security | < any | UNKNOWN |
ubuntu | 24.04 | noarch | flask-security | < any | UNKNOWN |
github.com/mattupstate/flask-security
launchpad.net/bugs/cve/CVE-2021-23385
nvd.nist.gov/vuln/detail/CVE-2021-23385
security-tracker.debian.org/tracker/CVE-2021-23385
security.snyk.io/vuln/SNYK-PYTHON-FLASKSECURITY-1293234
snyk.io/blog/url-confusion-vulnerabilities/
www.cve.org/CVERecord?id=CVE-2021-23385
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
36.2%