Flask-AppBuilder Open Redirect vulnerability
Impact
If using Flask-AppBuilder OAuth, an attacker can share a carefully crafted URL with a trusted domain for an application built with Flask-AppBuilder, this URL can redirect a user to a malicious site. This is an open redirect vulnerability
Patches
Install Flask-AppBuilder 3.2.2 or above
Workarounds
Filter HTTP traffic containing ?next={next-site} where the next-site domain is different from the application you are protecting
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | flask-appbuilder | < 3.3.2 | 3.3.2 |
References
- https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-624f-cqvr-3qw4
- https://github.com/dpgaspar/Flask-AppBuilder/commit/6af28521589599b1dbafd6313256229ee9a4fa74
- https://nvd.nist.gov/vuln/detail/CVE-2021-32805
- https://github.com/dpgaspar/Flask-AppBuilder
- https://github.com/dpgaspar/Flask-AppBuilder/releases/tag/v3.3.2
- https://github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2021-359.yaml
- https://pypi.org/project/Flask-AppBuilder
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-601- Platform
- Python (PyPI)
- Package
flask-appbuilder- Disclosed
- 08.09.2021
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2021-359 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-624f-cqvr-3qw4 - CC BY 4.0
Vulnerability history: flask-appbuilder
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 14
- First → latest
- 05.2021 09.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 2
- Medium 9
- Low 2
Disclosures per year
- 2021: 3
- 2022: 3
- 2023: 2
- 2024: 3
- 2025: 3
- 2026: 0
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Flask-AppBuilder Open Redirect vulnerability this entry
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