FreeBSD : py-flask-security -- user redirect to arbitrary URL vulnerability (06492bd5-085a-4cc0-9743-e30164bdcb1c)

medium Nessus Plugin ID 180378



The remote FreeBSD host is missing one or more security-related updates.


The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 06492bd5-085a-4cc0-9743-e30164bdcb1c advisory.

- 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 \\\ 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. (CVE-2021-23385)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 180378

File Name: freebsd_pkg_06492bd5085a4cc09743e30164bdcb1c.nasl

Version: 1.0

Type: local

Published: 8/31/2023

Updated: 8/31/2023

Risk Information


Risk Factor: Low

Score: 3.8


Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2021-23385


Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:py310-flask-security, p-cpe:/a:freebsd:freebsd:py311-flask-security, p-cpe:/a:freebsd:freebsd:py37-flask-security, p-cpe:/a:freebsd:freebsd:py38-flask-security, p-cpe:/a:freebsd:freebsd:py39-flask-security, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/31/2023

Vulnerability Publication Date: 8/2/2022

Reference Information

CVE: CVE-2021-23385