CVE-2025-59531: argo cd — Exploit & Fix

Description

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions 1.2.0 through 1.8.7, 2.0.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.7 and 3.0.18 are vulnerable to malicious API requests which can crash the API server and cause denial of service to legitimate clients. Without a configured webhook.bitbucketserver.secret, Argo CD's /api/webhook endpoint crashes when receiving a malformed Bitbucket Server payload (non-array repository.links.clone field). A single unauthenticated request triggers CrashLoopBackOff, and targeting all replicas causes complete API outage. This issue is fixed in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-703 CWE-703

Affected Products

Vendor	Product	Versions
argoproj	argo_cd	1.2.0 — 1.8.7
argoproj	argo_cd	2.0.0 — 2.14.20
argoproj	argo_cd	3.0.0 — 3.0.19
argoproj	argo_cd	3.1.0 — 3.1.8
argoproj	argo_cd	All

References

Advisories & Patches

https://github.com/argoproj/argo-cd/commit/5c466a4e39802e059e75c0008ae7b7b8e842538f https://github.com/argoproj/argo-cd/security/advisories/GHSA-f9gq-prrc-hrhc https://github.com/argoproj/argo-cd/security/advisories/GHSA-f9gq-prrc-hrhc

Exploits

https://github.com/argoproj/argo-cd/security/advisories/GHSA-f9gq-prrc-hrhc https://github.com/argoproj/argo-cd/security/advisories/GHSA-f9gq-prrc-hrhc

Frequently Asked Questions

What is CVE-2025-59531? +

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions 1.2.0 through 1.8.7, 2.0.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.7 and 3.0.18 are vulnerable to malicious API requests which can crash the API server and cause denial of service to legitimate clients. Without a configured webhook.bitbucketserver.secret, Argo CD's /api/webhook endpoint crashes when receiving a malformed Bitbucket Server payload (non-array repository.links.clone field). A single unauthenticated request triggers CrashLoopBackOff, and targeting all replicas causes complete API outage. This issue is fixed in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-59531? +

CVE-2025-59531 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-59531? +

CVE-2025-59531 affects products from argoproj, specifically: argo_cd. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59531? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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