CVE-2019-25368
Unknown Unknown - Not Provided
Multiple XSS Vulnerabilities in OPNsense diag_backup.php Endpoint

Publication date: 2026-02-15

Last updated on: 2026-02-18

Assigner: VulnCheck

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.
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Meta Information
Published
2026-02-15
Last Modified
2026-02-18
Generated
2026-06-16
AI Q&A
2026-02-15
EPSS Evaluated
2026-06-15
NVD
CVE-2019-25368
EUVD
EUVD-2019-19410
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
opnsense opnsense 19.1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability exists in OPNsense 19.1 and involves multiple cross-site scripting (XSS) issues in the diag_backup.php endpoint.

Attackers can inject malicious scripts through several parameters such as GDrive_GDriveEmail, GDrive_GDriveFolderID, GDrive_GDriveBackupCount, Nextcloud_url, Nextcloud_user, Nextcloud_password, Nextcloud_password_encryption, and Nextcloud_backupdir.

By submitting POST requests containing script payloads in these parameters, attackers can execute arbitrary JavaScript within the context of authenticated administrator sessions.

Impact Analysis

This vulnerability allows attackers to execute arbitrary JavaScript code in the context of authenticated administrator sessions.

Such execution can lead to unauthorized actions being performed with administrator privileges, potentially compromising the security and integrity of the system.

It may also allow attackers to steal sensitive information, hijack sessions, or manipulate backup configurations.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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