JetBackup – Backup, Restore & Migrate 3.1.7.9 - 3.1.23.3 - Authenticated (Subscriber+) Privilege Escalation
Strategic Overview
- Status
- Patched in 3.1.23.5
- Affected Plugin
- JetBackup – Backup, Restore & Migrate
- Affected Version
3.1.7.9 – 3.1.23.3- CVSS
- 6.3Medium
- Weakness type
- CWE-269 · Improper Privilege Management
- CVE
CVE-2026-19453
At a glance
CVE-2026-19453 is a medium-severity Improper Privilege Management vulnerability in the JetBackup WordPress plugin, affecting versions 3.1.7.9 – 3.1.23.3. It carries a CVSS score of 6.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.1.23.5; sites on affected versions should update now. Disclosed September 2026, reported by Jakub Herman.
Vulnerability Overview
The JetBackup – Backup, Restore & Migrate plugin for WordPress is vulnerable to Privilege Escalation in versions 3.1.7.9 through 3.1.23.3. This is due to insufficient restriction on the capabilities a user may grant themselves. This makes it possible for authenticated attackers, with subscriber-level access and above, to elevate their privileges beyond those intended for their role.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.
CWE-269: Improper Privilege Management
Reaching this weakness in JetBackup 3.1.7.9 – 3.1.23.3 takes an account at Subscriber level or above. Improper privilege management means the code lets an account end up with capabilities its role should not have.
It converts a low-privileged account into an administrative one, which makes every other restriction on the site irrelevant. For JetBackup the fix is 3.1.23.5: builds 3.1.7.9 – 3.1.23.3 are affected, anything from 3.1.23.5 onward is not.
Remediation
Update to version 3.1.23.5, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: JetBackup 3.1.23.5 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in JetBackup – Backup, Restore & Migrate
- 9.8CVE-2023-7165: JetBackup <= 2.0.9.7 Sensitive Information Exposure
CVE-2023-7165 - 8.8CVE-2020-36669: JetBackup CSRF to Arbitrary File Upload
CVE-2020-36669 - 8.8WordPress Backup and Migrate Plugin Arbitrary File Upload
- 7.2CVE-2021-24155: Backup Guard <= 1.5.9 Arbitrary File Upload
CVE-2021-24155 - 6.1CVE-2017-10837: BackupGuard <= 1.1.46 Reflected Cross-Site Scripting
CVE-2017-10837 - 6.1CVE-2017-18488: Backup Guard <= 1.1.46 Cross-Site Scripting
CVE-2017-18488 - 5.5CVE-2022-34148: Backup Guard <= 1.6.9 Stored Cross-Site Scripting
CVE-2022-34148 - 5.4CVE-2020-36667: JetBackup Unauthorized Backup Location Change
CVE-2020-36667
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