# CVE-2023-49438: Open redirect vulnerability in Flask-Security-Too

Source: https://junglewise.ai/threats/cve-2023-49438-open-redirect-vulnerability-in-flask-security-too  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-12-26  
License: CC BY 4.0 with a link back

CVE-2023-49438 · Severity: low · CVSS 3.1 · Published 2023-12-26

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.

Technologies: [Flask-Security-Too (PyPI)](https://junglewise.ai/threats/technologies/flask-security-too). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2023-49438 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-49438 being exploited in the wild.

**How severe is CVE-2023-49438?** Low severity, with a CVSS score of 3.1, published 26 December 2023.

**Which products and versions are affected?** Flask-Security-Too (PyPI) ECOSYSTEM:introduced=0,fixed=5.3.3.

**Is there a fix for CVE-2023-49438?** Yes. Flask-Security-Too (PyPI): upgrade to 5.3.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2023-49438?** Check whether you run Flask-Security-Too (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Flask-Security-Too (PyPI): upgrade to 5.3.3 or later

  ```sh
  pip install "Flask-Security-Too>=5.3.3"
  ```


## Affected products

- Flask-Security-Too (PyPI) ECOSYSTEM:introduced=0,fixed=5.3.3

## Identifiers

- CVE-2023-49438
- GHSA-672h-6x89-76m5
- PYSEC-2023-248

## Related threats

- [Pallets-Eco Flask-Security-Too OAuth reauthentication freshness bypass](https://junglewise.ai/threats/cve-2026-46715-pallets-eco-flask-security-too-oauth-reauthentication-freshness)
- [Flask-Security-Too WebAuthn reauthentication freshness bypass](https://junglewise.ai/threats/flask-security-too-webauthn-reauthentication-freshness-bypass-1d81eff2)
- [Open Redirect in Flask-Security-Too](https://junglewise.ai/threats/open-redirect-in-flask-security-too-42401b09)
- [Open Redirect in Flask-Security-Too](https://junglewise.ai/threats/cve-2021-32618-open-redirect-in-flask-security-too)
- [CSRF Vuln can expose user's QRcode](https://junglewise.ai/threats/csrf-vuln-can-expose-user-s-qrcode-5d832024)