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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.

PUBLISHED Reserved 2026-02-15 | Published 2026-02-15 | Updated 2026-02-17 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

19.1
affected

Credits

Ozer Goker finder

References

www.exploit-db.com/exploits/46351 (ExploitDB-46351) exploit

opnsense.org (OPNsense Official Website) product

forum.opnsense.org/index.php?topic=11469.0 (OPNsense 19.1.1 Release Announcement) patch

www.vulncheck.com/...nsense-reflected-xss-via-proxy-endpoint (VulnCheck Advisory: OPNsense 19.1 Reflected XSS via proxy endpoint) third-party-advisory

cve.org (CVE-2019-25376)

nvd.nist.gov (CVE-2019-25376)

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