How severe is CVE-2023-39000?

CVE-2023-39000 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-39000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39000?

CVE-2023-39000 affects Opnsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39000?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-39000 published?

CVE-2023-39000 was published on 2023-08-09 and last updated on 2026-06-17.

CVE-2023-39000

CVE-2023-39000 is a medium-severity vulnerability in Opnsense with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Opnsense
Published: 2023-08-09
Last modified: 2026-06-17

Description

A reflected cross-site scripting (XSS) vulnerability in the component /ui/diagnostics/log/core/ of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows attackers to inject arbitrary JavaScript via the URL path.

Frequently asked questions

What is CVE-2023-39000?: A reflected cross-site scripting (XSS) vulnerability in the component /ui/diagnostics/log/core/ of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows attackers to inject arbitrary JavaScript via the URL path.
How severe is CVE-2023-39000?: CVE-2023-39000 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-39000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39000?: CVE-2023-39000 affects Opnsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39000?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-39000 published?: CVE-2023-39000 was published on 2023-08-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*

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