Flower before 2.2.0 contains a cross-site request forgery vulnerability because Tornado xsrf_cookies is disabled and the OAuth session cookie lacks SameSite. Attackers can lure authenticated users to malicious pages that POST to /api/worker/shutdown, /api/worker/pool/restart, or /api/task/revoke to shut down Celery workers, resize pools, and revoke tasks.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
mher flower unaffected
Version Status Constraints
0 affected < 2.2.0
2.2.0 unaffected —

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
Flower Project Subscribe
Flower Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/mher/flower cve-icon cve-icon
https://github.com/mher/flower/blob/v2.1.0/flower/api/control.py#L25-L27 cve-icon cve-icon
https://github.com/mher/flower/commit/3b2115af7f9c42bd2da2fbcbd919f77013e9ec51 cve-icon cve-icon
https://github.com/mher/flower/commit/a14408b16cc3d2877d36659005ce0d72b6162629 cve-icon cve-icon
https://github.com/mher/flower/issues/1217 cve-icon cve-icon
https://www.vulncheck.com/advisories/flower-before-2.2.0-csrf-via-worker-and-task-control-api-endpoints cve-icon cve-icon
History

Mon, 12 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Description Flower before 2.2.0 contains a cross-site request forgery vulnerability because Tornado xsrf_cookies is disabled and the OAuth session cookie lacks SameSite. Attackers can lure authenticated users to malicious pages that POST to /api/worker/shutdown, /api/worker/pool/restart, or /api/task/revoke to shut down Celery workers, resize pools, and revoke tasks.
Title Flower before 2.2.0 CSRF via Worker and Task Control API Endpoints
First Time appeared Flower Project
Flower Project flower
Weaknesses CWE-352
CPEs cpe:2.3:a:flower_project:flower:*:*:*:*:*:*:*:*
Vendors & Products Flower Project
Flower Project flower
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-12T20:55:06.611Z

Reserved: 2026-10-12T19:27:45.482Z

Link: CVE-2022-51020

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-12T21:17:06.227

Modified: 2026-10-12T21:17:06.227

Link: CVE-2022-51020

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T23:15:15Z

Weaknesses