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CVE-2019-25371

22
FAUCET Score

CVE-2019-25371 is a reflected cross-site scripting (XSS) vulnerability affecting OPNsense 19.1, allowing unauthenticated attackers to inject malicious scripts. This medium-severity vulnerability (CVSS 6.1) arises from insufficient input validation in the 'host' parameter of the diag_ping.php endpoint, enabling arbitrary JavaScript execution in a user's browser via crafted POST requests. While the vulnerability has a high FAUCET Risk Score of 86/100, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
19.1CPE matchmatch criteria
cpe:2.3:a:opnsense:opnsense:19.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.1MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
LOW
SS Integrity
LOW
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
15.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 16th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

forum.opnsense.org / index.php
Release Notes
opnsense.org
Product
exploit-db.com / exploits/46351
ExploitThird Party AdvisoryVDB Entry
vulncheck.com / advisories/opnsense-reflected-xss-via-diagpingphp
Broken Link