CVE-2022-30034: Flower OAuth authentication bypass
Summary
CVE-2022-30034: Flower OAuth authentication bypass. Affects flower versions < 1.2.0. Fixed in 1.2.0. How to fix ↓
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Background
Flower is a web UI for the Celery Python RPC framework. It provides a user-friendly interface for monitoring and managing Celery tasks. The Flower package is available on PyPI and is widely used in Python applications. However, all versions of Flower up to 05-02-2022 are vulnerable to an OAuth authentication bypass.
Vulnerability Detail
The vulnerability allows an attacker to bypass the OAuth authentication mechanism in Flower. By exploiting this vulnerability, an attacker can gain unauthorized access to the Flower API. This can lead to several potential risks, including the ability to discover and invoke arbitrary Celery RPC calls or disrupt the service by shutting down Celery task nodes. The severity of this vulnerability is rated as HIGH with a CVSS score of 8.6.
How To Fix
Latest published version: 2.2.0 as of 23 Oct 2026
pip install --upgrade "flower==2.2.0"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.2.0
This is the first release that contains the fix.
pip install --upgrade "flower==1.2.0"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
Flower, a web UI for the Celery Python RPC framework, is vulnerable to an OAuth authentication bypass. This vulnerability can be mitigated by upgrading to version 1.2.0 of the Flower package. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for flower →
FAQ
Flower is a web UI for the Celery Python RPC framework. It provides monitoring and management capabilities for Celery tasks.
The vulnerability allows an attacker to bypass OAuth authentication in Flower, potentially leading to unauthorized access and misuse of the Flower API.
To fix this vulnerability, upgrade to version 1.2.0 of the Flower package.
Yes, all versions of Flower up to 05-02-2022 are vulnerable to this OAuth authentication bypass.
No, the recommended solution is to upgrade to version 1.2.0 of the Flower package.
References
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