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CVE-2025-54376

Hoverfly authentication bypass

7.5 HIGHPublic exploitEPSS 0.71%
  1. Published10 Sept 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Hoverfly< 1.12.0

Remediation

Fixed in
Hoverfly≥ 1.12.0

References

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Frequently asked

Is CVE-2025-54376 being actively exploited?

CVE-2025-54376 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.71%.

How severe is CVE-2025-54376?

CVE-2025-54376 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.71% probability of exploitation.

Which products are affected by CVE-2025-54376?

Affected products include Hoverfly.

How do I fix CVE-2025-54376?

Upgrade affected software to a fixed version, for example Hoverfly 1.12.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-54376 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.