What is CVE-2023-39008?

CVE-2023-39008 is a critical-severity vulnerability in Opnsense, classified under Command Injection. CVSS score: 9.8/10. Published 2023-08-09.

How severe is CVE-2023-39008?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-39008 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Opnsense

CVE-2023-39008

A command injection vulnerability in the component /api/cron/settings/setJob/ of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows attackers to execute arbitrary system commands.

Vulnerability class: Command Injection (OS Command Injection)

Published 2023-08-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Opnsense

Weakness classification (CWE)

CWE-77 — Command Injection

Public proof-of-concept exploits

References

github.com/opnsense/core/commit/e800097d0c287bb665f0751a98a67c75ef7b45e5 (Patch)
logicaltrust.net/blog/2023/08/opnsense.html (Exploit, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2023-39008?: CVE-2023-39008 is a critical-severity vulnerability in Opnsense, classified under Command Injection. CVSS score: 9.8/10. Published 2023-08-09.
How severe is CVE-2023-39008?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-39008 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.