AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-23385

MEDIUM · CVSS 5.4 EPSS 1.13% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-08-02 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit
GitHub PoC Links
github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-23385
Severity
MEDIUM
CVSS
5.4
EPSS
1.13%

Original NVD 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.