Description
An open redirect vulnerability in the python package Flask-Security-Too <=5.3.2 allows attackers to redirect unsuspecting users to malicious sites via a crafted URL by abusing the ?next parameter on the /login and /register routes.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-Flask-Security | 5.5.2-1.1 | openSUSE-SU-2024:14555-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
brandon-t-elliott/CVE-2023-49438 ★ 5 · Dec 14, 2023
CVE-2023-49438 - Open Redirect Vulnerability in Flask-Security-Too
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Python Flask-Security-Too <=5.3.2 - Open Redirect http/cves/2023/CVE-2023-49438.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | flask-security-too | < 5.3.3 | 5.3.3 | GHSA-672h-6x89-76m5 |
Advisories 1
- openSUSE-SU-2024:14555-1 python310-Flask-Security-5.5.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026