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

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MEDIUM

OPNsense 19.1 Reflected XSS via proxy endpoint

Published Feb 15, 2026

5.1

MEDIUM

CVSS 4.0

EPSS 0.39%

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.

Affected products

Vendor Opnsense Product OPNsense Default
n/a
- Version
  19.1
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Opnsense

OPNsense

n/a

Version	Status	Constraints
19.1	affected	-

Remediation

Vendor solution

OPNsense 19.1.1 released

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (5)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-19418
Advisory
https://forum.opnsense.org/index.php?topic=11469.0
patchRelease Notes
https://opnsense.org
product
https://www.exploit-db.com/exploits/46351
exploitThird Party Advisory
https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-proxy-endpoint
third-party-advisoryThird Party Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-19418		Advisory
https://forum.opnsense.org/index.php?topic=11469.0		patchRelease Notes
https://opnsense.org		product
https://www.exploit-db.com/exploits/46351		exploitThird Party Advisory
https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-proxy-endpoint		third-party-advisoryThird Party Advisory