CVE-2026-19454 JetBackup 3.1.18.8 - 3.1.23.3 - Admin+ Multisite Network Backup Download
A network administrator can download full backups of all sites in a multisite network without Super Admin privileges due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19454?
CVE-2026-19454 is a medium-severity missing authorization vulnerability in Unknown JetBackup, published on 27 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-19454?
How do I fix CVE-2026-19454?
No fix has been published for CVE-2026-19454 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-19454 being exploited?
There is no known exploitation of CVE-2026-19454 in the wild and no public exploit code.
Sources
Also known as GHSA-6883-v78q-c9cg.