Medium severity · published Feb 15, 2026
CVE-2019-25373
OPNsense 19.1 Stored XSS via firewall_rules_edit.php
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
OPNsense 19.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by submitting crafted input to the category parameter. Attackers can send POST requests to firewall_rules_edit.php with script payloads in the category field to execute arbitrary JavaScript in the browsers of other users accessing firewall rule pages.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OPNsense · Opnsense
19.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-25373
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-25373
Release Notes
https://forum.opnsense.org/index.php?topic=11469.0
Product
https://opnsense.org
Exploit
https://www.exploit-db.com/exploits/46351
Broken Link
https://www.vulncheck.com/advisories/opnsense-stored-xss-via-firewallruleseditphp
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