CVE-2025-59531 | Unauthenticated argocd-server panic via a malicious Bitbucket-Server webhook payload

Exp

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.

Published: 2025-10-01 Last update: 2025-10-07 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-59531 is rated High Exploit Risk (62.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.26%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-59531

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-59531

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-06 0.24% 0.26% +0.02%
2 2026-05-07 0.25% 0.24% -0.01%
3 2026-04-27 — 0.25% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-59531

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2025-59531

GitHub Security Advisory for CVE-2025-59531

GHSA-f9gq-prrc-hrhc · Severity: high · Ecosystem: go — Unauthenticated argocd-server panic via a malicious Bitbucket-Server webhook payload

OS Trackers for CVE-2025-59531

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2025-59531

Affected software / configurations for CVE-2025-59531

Vendor Product Version Raw CPE
argoproj argo_cd >= 1.2.0, <= 1.8.7 cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
argoproj argo_cd >= 2.0.0, < 2.14.20 cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
argoproj argo_cd >= 3.0.0, < 3.0.19 cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
argoproj argo_cd >= 3.1.0, < 3.1.8 cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
argoproj argo_cd 3.2.0 cpe:2.3:a:argoproj:argo_cd:3.2.0:rc1:*:*:*:*:*:*

References for CVE-2025-59531

cvelogic Threat Intelligence