CVE-2019-25368

MEDIUM 5.4

OPNsense 19.1 Reflected XSS via diag_backup.php

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	opnsense
Product	opnsense
Published	Feb 15, 2026
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Opnsense / OPNsense

19.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/46351 opnsense.org: https://opnsense.org forum.opnsense.org: https://forum.opnsense.org/index.php?topic=11469.0 vulncheck.com: https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-diagbackupphp

Credits

Ozer Goker