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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: CVE-2025-54123 is a **Command Injection** flaw in Hoverfly. ๐ฅ **Consequences**: Unauthenticated attackers can achieve **Remote Code Execution (RCE)** on the host system.โฆ
๐ก๏ธ **Root Cause**: **CWE-20 (Improper Input Validation)**. The middleware API endpoint (`/api/v2/hoverfly/middleware`) fails to sanitize the `binary` and `script` parameters.โฆ
๐ฆ **Affected**: **SpectoLabs Hoverfly**. ๐ **Versions**: **1.11.3 and earlier**. Any instance running these versions with the middleware API exposed is at risk.
Q4What can hackers do? (Privileges/Data)
๐ **Attacker Capabilities**: Full **RCE**. Hackers can execute arbitrary commands with the privileges of the Hoverfly process. ๐ **Data Impact**: High risk of data exfiltration, system compromise, and lateral movement.
Q5Is exploitation threshold high? (Auth/Config)
โก **Exploitation Threshold**: **LOW**. ๐ซ **Auth**: **Unauthenticated** (PR:N). ๐ฑ๏ธ **UI**: **None required** (UI:N). ๐ **Network**: Remote (AV:N). If the port is open, you are vulnerable.
Q6Is there a public Exp? (PoC/Wild Exploitation)
๐ **Public Exploit**: **YES**. A Nuclei template is available via ProjectDiscovery. ๐ **PoC**: Confirmed via GitHub Security Advisory (GHSA-r4h8-hfp2-ggmf). Wild exploitation is highly likely.
Q7How to self-check? (Features/Scanning)
๐ **Self-Check**: Scan for **Hoverfly v1.11.3 or below**. Check if the `/api/v2/hoverfly/middleware` endpoint is accessible. ๐งช Use Nuclei with the provided CVE template to verify injection points.
Q8Is it fixed officially? (Patch/Mitigation)
โ **Fixed**: **YES**. SpectoLabs has released patches. ๐ **Commit**: See `17e60a9` and `a9d4da7` on GitHub. ๐ **Action**: Upgrade to the latest version immediately.
Q9What if no patch? (Workaround)
๐ง **No Patch Workaround**: **Block Network Access**. Restrict access to the middleware API endpoint (`/api/v2/hoverfly/middleware`) via firewall rules. ๐ Do not expose it to the internet without authentication.
Q10Is it urgent? (Priority Suggestion)
๐ฅ **Urgency**: **CRITICAL**. CVSS Score is **High (9.8+ implied by H/H/H)**. โณ **Priority**: Patch **IMMEDIATELY**. This is an unauthenticated RCE; automated scanners are already hunting for this.