Security readout for executives and security teams
Plain-English summary
CVE-2019-25370 is a reflected cross-site scripting issue in OPNsense 19.1. A malicious request can cause script code to run in a user’s browser when they interact with the affected VLAN edit page. Business impact is mainly session abuse, interface manipulation, or data exposure through a targeted user, not direct firewall takeover.
Executive priority
Treat as a moderate-priority remediation item, higher if OPNsense management is internet-accessible or used from shared workstations. The issue enables browser-side compromise of administrators, which can support follow-on actions, but sources do not indicate active exploitation.
Technical view
OPNsense 19.1 is reported vulnerable to reflected XSS in interfaces_vlan_edit.php. Crafted input in the tag, descr, or vlanif parameters can be reflected into the browser as JavaScript. The CVSS 3.1 score is 6.1 with network attack vector, low complexity, required user interaction, changed scope, and low confidentiality/integrity impact.
Likely exposure
Exposure is most likely where OPNsense 19.1 is still deployed and the web management interface is reachable by potential attackers or untrusted users. Internet-exposed management interfaces increase risk. Systems on newer or supported OPNsense releases may not be affected, but confirm against vendor guidance.
Exploitation context
A public Exploit-DB entry exists, so defenders should assume proof-of-concept details are available. The provided sources do not show CISA KEV listing or confirmed active exploitation. Successful abuse requires user interaction and execution in the victim’s browser context.
Researcher notes
The record maps to CWE-79 and CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. Public reporting identifies parameters tag, descr, and vlanif in interfaces_vlan_edit.php. Avoid assuming authentication requirements or patch details beyond the cited OPNsense 19.1.1 reference and advisory.
Mitigation direction
- Upgrade OPNsense 19.1 to a vendor-supported fixed release.
- Review the OPNsense 19.1.1 announcement and current vendor advisories.
- Restrict management interface access to trusted administrative networks.
- Use strong administrative session hygiene and limit privileged browser exposure.
- Monitor for unexpected web management activity involving VLAN edit pages.
Validation and detection
- Inventory OPNsense instances and identify any running version 19.1.
- Confirm whether interfaces_vlan_edit.php is present on exposed management interfaces.
- Check whether administrative UI access is reachable from untrusted networks.
- Review web logs for unusual POST activity to interfaces_vlan_edit.php.
- Verify remediation against OPNsense release notes or vendor documentation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-25370 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-46351CVE reference · exploit
- OPNsense Official WebsiteCVE reference · product
- OPNsense 19.1.1 Release AnnouncementCVE reference · patch
- VulnCheck Advisory: OPNsense 19.1 Reflected XSS via interfaces_vlan_edit.phpCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.