CVE-2026-19454
Deferred Deferred - Pending Action

JetBackup WordPress Plugin Unauthorized Full Backup Access

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: WPScan

Description
The JetBackup WordPress plugin before 3.1.23.5 does not perform its multisite authorisation check before serving backup archives and job logs, allowing an administrator of the network's main site who is not a Super Admin to download a full backup of the entire network, including every site's data and the shared webroot.

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Meta Information

Published
2026-08-27
Last Modified
2026-08-27
Generated
2026-09-16
AI Q&A
2026-08-27
EPSS Evaluated
2026-09-15
NVD
CVE-2026-19454
EUVD
EUVD-2026-66875

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
jetbackup jetbackup to 3.1.23.5 (exc)
jetbackup jetbackup From 3.1.18.8 (inc) to 3.1.23.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

This vulnerability in the JetBackup WordPress plugin before version 3.1.23.5 allows an administrator of the main site in a multisite network to download full backups of the entire network, including all sites' data and shared webroot. The issue occurs because the plugin does not perform proper multisite authorization checks before serving backup archives and job logs.

Detection Guidance

Check the installed version of the JetBackup WordPress plugin. If it is between 3.1.18.8 and 3.1.23.3, the system is vulnerable. Update to version 3.1.23.5 or later to resolve the issue.

Impact Analysis

An attacker with administrator access to the main site could exploit this to steal sensitive data from all sites in the network, including user information, configurations, and files. This could lead to data breaches, unauthorized access, or further attacks on other systems.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations by exposing personal or sensitive data. Unauthorized access to backups may result in data leaks, violating privacy requirements and potentially leading to legal penalties or reputational damage.

Mitigation Strategies

Immediately update the JetBackup WordPress plugin to version 3.1.23.5 or higher. Ensure that only Super Admins have administrative access to the network's main site to prevent unauthorized downloads of backups.

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