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Vulnerability · CVE-2025-54123

hoverfly hoverfly Improper Input Validation

Published Nov 10, 2025 · corrected/updated Nov 10, 2025 · hoverfly hoverfly · evidence confidence very high

Hoverfly is an open source API simulation tool. In versions 1.11.3 and prior, the middleware functionality in Hoverfly is vulnerable to command injection vulnerability at endpoint due to insufficient validation and sanitization in user input. The vulnerability exists in the middleware management API endpoint . This issue is born due to combination of three code level flaws: Insufficient Input Validation in middleware.go line 94-96; Unsafe Command Execution in local_middleware.go line 14-19; and Immediate Execution During Testing in hoverfly_service.go line 173. This allows an attacker to gain Initial-access exploit intelligence.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2025-54123 is a unknown public vulnerability record for hoverfly hoverfly. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether hoverfly hoverfly is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: hoverfly hoverfly. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: no CVSS/EPSS yet. CISA lists it as known exploited. Sources contributing to this record: cve_org, vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Confirmed in CISA KEV since Nov 10, 2025. Listed in CISA KEV and VulnCheck KEV.

  • Patch and remediation

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 10, 2025 · VulnCheck KEV

    Detected

    Hoverfly is an open source API simulation tool. In versions 1.11.3 and prior, the middleware functionality in Hoverfly is vulnerable to command injection vulnerability at endpoint due to insufficient validation and sanitization in user input. The vulnerability exists in the middleware management API endpoint . This issue is born due to combination of three code level flaws: Insufficient Input Vali

  2. Nov 10, 2025 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected

  • vendor hoverfly hoverflyversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2025-54123

    Official CVE identifier

    cve.org
  • VulnCheck KEVConfirmed exploitationCVE-2025-54123

    Hoverfly is an open source API simulation tool. In versions 1.11.3 and prior, the middleware functionality in Hoverfly is vulnerable to command injection vulnerability at endpoint due to insufficient validation and sanitization in user input. The vulnerability exists in the middl

    vulncheck.com

References