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. Attacke

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.

Affected Products

References

• https://forum.opnsense.org/index.php?topic=11469.0(Release Notes)
• https://opnsense.org(Product)
• https://www.exploit-db.com/exploits/46351(Exploit, Third Party Advisory, VDB Entry)
• https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-monit-interface(Third Party Advisory)