Auth bypass in Jetbackup
CVE-2026-19454
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.
Vulnerability class: Broken Access Control
EPSS: 0.002 (7.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Unknown Jetbackup
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-19454?
- CVE-2026-19454 is a medium-severity vulnerability in Jetbackup, classified under Incorrect Authorization. CVSS score: 4.4/10. Published 2026-08-27.
- How severe is CVE-2026-19454?
- Medium severity. CVSS v3 base score is 4.4 out of 10.