# CVE-2025-54123: Hoverfly is vulnerable to Remote Code Execution through an insecure middleware implementation

Source: https://junglewise.ai/threats/cve-2025-54123-hoverfly-is-vulnerable-to-remote-code-execution-through-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-09-17  
License: CC BY 4.0 with a link back

CVE-2025-54123 · Severity: low · CVSS 3.1 · Published 2025-09-17

Hoverfly is vulnerable to Remote Code Execution through an insecure middleware implementation in github.com/SpectoLabs/hoverfly

Technologies: [github.com/SpectoLabs/hoverfly (Go)](https://junglewise.ai/threats/technologies/github-com-spectolabs-hoverfly). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2025-54123 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-54123 being exploited in the wild.

**How severe is CVE-2025-54123?** Low severity, with a CVSS score of 3.1, published 17 September 2025.

**Which products and versions are affected?** github.com/SpectoLabs/hoverfly (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.11.3.

**Is there a fix for CVE-2025-54123?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-54123?** Check whether you run github.com/SpectoLabs/hoverfly (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- github.com/SpectoLabs/hoverfly (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.11.3

## Identifiers

- CVE-2025-54123
- GHSA-r4h8-hfp2-ggmf
- GO-2025-3944

## Related threats

- [SpectoLabs Hoverfly denial of service via goroutine leak in post-serve actions](https://junglewise.ai/threats/cve-2026-50018-spectolabs-hoverfly-denial-of-service-via-goroutine-leak-in-post)
- [SpectoLabs Hoverfly race condition in Diff mode](https://junglewise.ai/threats/cve-2026-50013-spectolabs-hoverfly-race-condition-in-diff-mode)
- [WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled](https://junglewise.ai/threats/cve-2025-54376-websocket-endpoint-api-v2-ws-logs-reachable-without)
- [Hoverfly allows an arbitrary file read in the `/api/v2/simulation` endpoint (`GHSL-2023-274`)](https://junglewise.ai/threats/cve-2024-45388-hoverfly-allows-an-arbitrary-file-read-in-the-api-v2-simulation)