How severe is CVE-2019-25376?

CVE-2019-25376 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-2019-25376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-25376?

CVE-2019-25376 affects Opnsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25376?

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

Does CVE-2019-25376 have an EU (EUVD) identifier?

Yes. CVE-2019-25376 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19418.

When was CVE-2019-25376 published?

CVE-2019-25376 was published on 2026-02-15 and last updated on 2026-06-17.

CVE-2019-25376

CVE-2019-25376 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)
CVSS v4: 5.1
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-19418
Weakness: CWE-79
Affected product: Opnsense
Published: 2026-02-15
Last modified: 2026-06-17

Description

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted payloads through the ignoreLogACL parameter. Attackers can send POST requests to the proxy endpoint with JavaScript code in the ignoreLogACL parameter to execute arbitrary scripts in users' browsers.

Frequently asked questions

What is CVE-2019-25376?: OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted payloads through the ignoreLogACL parameter. Attackers can send POST requests to the proxy endpoint with JavaScript code in the ignoreLogACL parameter to execute arbitrary scripts in users' browsers.
How severe is CVE-2019-25376?: CVE-2019-25376 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-2019-25376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25376?: CVE-2019-25376 affects Opnsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25376?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2019-25376 have an EU (EUVD) identifier?: Yes. CVE-2019-25376 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19418.
When was CVE-2019-25376 published?: CVE-2019-25376 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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