What’s Vulnerable › Vulnerabilities

CVE-2023-39002

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-08-09 · updated 2026-06-17
• Weakness: CWE-79

Description

A cross-site scripting (XSS) vulnerability in the act parameter of system_certmanager.php in OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Affected products

• OPNsense: before 23.7 — fixed in 23.7

How to fix

Upgrade to a fixed version: OPNsense 23.7. Check the vendor advisory for mitigations.

References

• https://github.com/opnsense/core/commit/a4f6a8f8d604271f81984cfcbba0471af58e34dc
• https://logicaltrust.net/blog/2023/08/opnsense.html
• https://github.com/opnsense/core/commit/a4f6a8f8d604271f81984cfcbba0471af58e34dc
• https://logicaltrust.net/blog/2023/08/opnsense.html

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