How severe is CVE-2019-25369?

CVE-2019-25369 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-25369 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-25369?

CVE-2019-25369 affects Opnsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25369?

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

Does CVE-2019-25369 have an EU (EUVD) identifier?

Yes. CVE-2019-25369 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19426.

When was CVE-2019-25369 published?

CVE-2019-25369 was published on 2026-02-15 and last updated on 2026-06-17.

CVE-2019-25369

CVE-2019-25369 is a medium-severity vulnerability in Opnsense with a CVSS 3.x base score of 6.4. 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 6.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-19426
Weakness: CWE-79
Affected product: Opnsense
Published: 2026-02-15
Last modified: 2026-06-17

Description

OPNsense 19.1 contains a stored cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject persistent malicious scripts via the tunable parameter. Attackers can submit POST requests with script payloads that are stored and executed in the context of authenticated user sessions when the page is viewed.

Frequently asked questions

What is CVE-2019-25369?: OPNsense 19.1 contains a stored cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject persistent malicious scripts via the tunable parameter. Attackers can submit POST requests with script payloads that are stored and executed in the context of authenticated user sessions when the page is viewed.
How severe is CVE-2019-25369?: CVE-2019-25369 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-25369 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25369?: CVE-2019-25369 affects Opnsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25369?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2019-25369 have an EU (EUVD) identifier?: Yes. CVE-2019-25369 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19426.
When was CVE-2019-25369 published?: CVE-2019-25369 was published on 2026-02-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opnsense:opnsense:19.1:*:*:*:*:*:*:*

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