CVE-2025-34073
CVE-2025-34073 is a critical-severity vulnerability with a CVSS 4.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Critical (CVSS 4.0 base score 10.0)
- EPSS exploit prediction: 4% (89th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-19716
- Weakness: CWE-78
- Published:
- Last modified:
Description
An unauthenticated command injection vulnerability exists in stamparm/maltrail (Maltrail) versions <=0.54. A remote attacker can execute arbitrary operating system commands via the username parameter in a POST request to the /login endpoint. This occurs due to unsafe handling of user-supplied input passed to subprocess.check_output() in core/http.py, allowing injection of shell metacharacters. Exploitation does not require authentication and commands are executed with the privileges of the Maltrail process.
Frequently asked questions
- What is CVE-2025-34073?
- An unauthenticated command injection vulnerability exists in stamparm/maltrail (Maltrail) versions <=0.54. A remote attacker can execute arbitrary operating system commands via the username parameter in a POST request to the /login endpoint. This occurs due to unsafe handling of user-supplied input passed to subprocess.check_output() in core/http.py, allowing injection of shell metacharacters. Exploitation does not require authentication and commands are executed with the privileges of the Maltrail process.
- How severe is CVE-2025-34073?
- CVE-2025-34073 has a CVSS 4.0 base score of 10.0, rated critical severity.
- Is CVE-2025-34073 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34073?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-34073 have an EU (EUVD) identifier?
- Yes. CVE-2025-34073 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19716.
- When was CVE-2025-34073 published?
- CVE-2025-34073 was published on 2025-07-02 and last updated on 2026-06-17.
References
- https://github.com/stamparm/maltrail
- https://github.com/stamparm/maltrail/issues/19146
- https://huntr.com/bounties/be3c5204-fbd9-448d-b97c-96a8d2941e87
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/http/maltrail_rce.rb
- https://vulncheck.com/advisories/stamparm-maltrail-rce
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