Medium 6.1Published Feb 15, 2026

CVE-2019-25376OPNsense 19.1 Reflected XSS via proxy endpoint

Updated under an hour ago (Oct 26, 2026, 5:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for OPNsense

Exploited in the last 30 days

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.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Opnsense OPNsense opnsense:opnsense (from the name)	19.1	CNA record
opnsense opnsense opnsense:opnsense	19.1	NVD

References

https://www.exploit-db.com/exploits/46351exploit, third-party-advisory
https://opnsense.orgproduct
https://forum.opnsense.org/index.php?topic=11469.0patch, release-notes
https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-proxy-endpointthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.