CVE-2019-25375

MEDIUM 6.1CVE-2019-25375 · Published 15/02/2026 · updated 17/06/2026

In short

CVE-2019-25375 is a MEDIUM (CVSS 6.1) vulnerability affecting opnsense (opnsense).
Chance of exploitation in the next 30 days (EPSS): 0.42%, higher than 35.9% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
opnsense opnsense	`= 19.1`	No fix yet

Description

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

References

forum.opnsense.org/index.php · Release Notes
opnsense.org · Product
exploit-db.com/exploits/46351 · Exploit
vulncheck.com/advisories/opnsense-reflected-xss-via-monit-interface · Third Party Advisory

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Package

Affected versions

Patched versions

opnsense

= 19.1

No fix yet

Description

More vulnerabilities in opnsense

See all →