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4.8
OPNsense 19.1 allows malicious script injection via diag_backup.php
CVE-2019-25368
Summary
An attacker can inject malicious scripts into OPNsense 19.1's diag_backup.php endpoint, allowing them to execute code in the context of an administrator session. This could enable unauthorized access to sensitive data or system settings. Update to the latest version to fix the issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| opnsense | opnsense | 19.1 | – |
Original title
OPNsense 19.1 contains multiple cross-site scripting vulnerabilities in the diag_backup.php endpoint that allow attackers to inject malicious scripts through multiple parameters including GDrive_GD...
Original description
OPNsense 19.1 contains multiple cross-site scripting vulnerabilities in the diag_backup.php endpoint that allow attackers to inject malicious scripts through multiple parameters including GDrive_GDriveEmail, GDrive_GDriveFolderID, GDrive_GDriveBackupCount, Nextcloud_url, Nextcloud_user, Nextcloud_password, Nextcloud_password_encryption, and Nextcloud_backupdir. Attackers can submit POST requests with script payloads in these parameters to execute arbitrary JavaScript in the context of authenticated administrator sessions.
nvd CVSS3.1
5.4
nvd CVSS4.0
4.8
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
- https://forum.opnsense.org/index.php?topic=11469.0 Release Notes
- https://opnsense.org Product
- https://www.exploit-db.com/exploits/46351 Exploit Third Party Advisory VDB Entry
- https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-diagbackupphp Broken Link
Published: 15 Feb 2026 · Updated: 10 Mar 2026 · First seen: 6 Mar 2026