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CVE-2025-54123

50
FAUCET Score

CVE-2025-54123 is a critical command injection vulnerability affecting Hoverfly versions 1.11.3 and prior. This flaw, stemming from insufficient input validation and unsafe command execution in the middleware functionality, allows unauthenticated attackers to achieve remote code execution (RCE) on systems running the vulnerable service. With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not currently listed in CISA KEV, a Nuclei template for exploitation exists, and the vulnerability has garnered some community discussion, indicating potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.12.0CPE matchmatch criteria
cpe:2.3:a:hoverfly:hoverfly:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
10.54%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2025-54123 · Sep 13, 2025
This CVE's current EPSS score of 0.1054 is in the 91st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

goGHSA-r4h8-hfp2-ggmfcritical

Hoverfly is vulnerable to Remote Code Execution through an insecure middleware implementation

Sep 10, 2025

References

github.com / SpectoLabs/hoverfly/blob/master/core/hoverfly_service.go
Product
github.com / SpectoLabs/hoverfly/blob/master/core/middleware/local_middleware.go
Product
github.com / SpectoLabs/hoverfly/blob/master/core/middleware/middleware.go
Product
github.com / SpectoLabs/hoverfly/commit/17e60a9bc78826deb4b782dca1c1abd3dbe60d40
Patch
github.com / SpectoLabs/hoverfly/commit/a9d4da7bd7269651f54542ab790d0c613d568d3e
Patch
github.com / SpectoLabs/hoverfly/security/advisories/GHSA-r4h8-hfp2-ggmf
ExploitVendor Advisory