CVE-2026-19454: Unknown Jetbackup

Medium severity, CVSS 4.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Unknown Jetbackup: from 3.1.18.8, before 3.1.23.5 (fixed in 3.1.23.5)

Published 2026-08-27. Last modified 2026-08-28.