Description
OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by exploiting insufficient input validation in the host parameter. Attackers can submit crafted POST requests to the diag_ping.php endpoint with script payloads in the host parameter to execute arbitrary JavaScript in users' browsers.
Exploits (1)
References (4)
Core 4
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/46351
Various Sources product
https://opnsense.org
Various Sources patch
https://forum.opnsense.org/index.php?topic=11469.0
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-diagpingphp
Scores
CVSS v3
6.1
EPSS
0.0006
EPSS Percentile
17.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (1)
opnsense/opnsense
19.1
Published
Feb 15, 2026
Tracked Since
Feb 18, 2026