CVE-2019-25373

Name: CVE-2019-25373
Creator: NVD / NIST
Published: 2026-02-15T14:16:07.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.1/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2019-25373 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

5.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/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

EPSS Probability

0.20%

9.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Opnsense	Opnsense	19.1

References

https://forum.opnsense.org/index.php?topic=11469.0Release Notes
https://opnsense.orgProduct
https://www.exploit-db.com/exploits/46351Exploit, Third Party Advisory, VDB Entry
https://www.vulncheck.com/advisories/opnsense-stored-xss-via-firewallruleseditphpBroken Link

Timeline

Published: Feb 15, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2019-25373?

How severe is CVE-2019-25373?

CVE-2019-25373 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2019-25373?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-25373?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST