Reported vulnerability

Jetpack 12.0 - 16.1.2 - Authenticated (Administrator+) PHP Object Injection

Published 3 Sept 2026

Updated 4 Sept 2026

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Wordfence advisory

high · CVSS 7.2

The Jetpack – WP Security, Backup, Speed, & Growth plugin for WordPress is vulnerable to PHP Object Injection in versions 12.0 through 16.1.2 via deserialization of untrusted post metadata in the Jetpack Import REST API. This makes it possible for authenticated attackers with the import capability, which is granted to administrators by default, to inject a PHP object. The direct impact is attacker-controlled object instantiation; confidentiality, integrity, and availability impact requires a compatible POP chain in Jetpack or another installed component.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Jetpack – WP Security, Backup, Speed, & Growth

Software: plugin · jetpack
Affected versions: From 12.0, through 12.0.2; From 12.1, through 12.1.2; From 12.2, through 12.2.2; From 12.3, through 12.3.1; From 12.4, through 12.4.1; From 12.5, through 12.5.1; From 12.6, through 12.6.3; From 12.7, through 12.7.2; From 12.8, through 12.8.2; From 12.9, through 12.9.4; From 13.0, through 13.0.1; From 13.1, through 13.1.4; From 13.2, through 13.2.3; From 13.3, through 13.3.2; From 13.4, through 13.4.4; From 13.5, through 13.5.1; From 13.6, through 13.6.1; From 13.7, through 13.7.1; From 13.8, through 13.8.2; From 13.9, through 13.9.1; From 14.0, through 14.0; From 14.1, through 14.1; From 14.2, through 14.2.1; From 14.3, through 14.3; From 14.4, through 14.4.1; From 14.5, through 14.5; From 14.6, through 14.6; From 14.7, through 14.7; From 14.8, through 14.8; From 14.9, through 14.9.1; From 15.0, through 15.0.2; From 15.1, through 15.1.1; From 15.2, through 15.2; From 15.3, through 15.3.1; From 15.4, through 15.4; From 15.5, through 15.5; From 15.6, through 15.6; From 15.7, through 15.7.1; From 15.8, through 15.8; From 15.9, through 15.9.1; From 16.0, through 16.0.1; From 16.1, through 16.1.2
Fix availability: Fix available
Fixed versions: 12.0.3, 12.1.3, 12.2.3, 12.3.2, 12.4.2, 12.5.2, 12.6.4, 12.7.3, 12.8.3, 12.9.5, 13.0.2, 13.1.5, 13.2.4, 13.3.3, 13.4.5, 13.5.2, 13.6.2, 13.7.2, 13.8.3, 13.9.2, 14.0.1, 14.1.1, 14.2.2, 14.3.1, 14.4.2, 14.5.1, 14.6.1, 14.7.1, 14.8.1, 14.9.2, 15.0.3, 15.1.2, 15.2.1, 15.3.2, 15.4.1, 15.5.1, 15.6.1, 15.7.2, 15.8.1, 15.9.2, 16.0.2, 16.1.3

Recommended action

Update to one of the following versions, or a newer patched version: 12.0.3, 12.1.3, 12.2.3, 12.3.2, 12.4.2, 12.5.2, 12.6.4, 12.7.3, 12.8.3, 12.9.5, 13.0.2, 13.1.5, 13.2.4, 13.3.3, 13.4.5, 13.5.2, 13.6.2, 13.7.2, 13.8.3, 13.9.2, 14.0.1, 14.1.1, 14.2.2, 14.3.1, 14.4.2, 14.5.1, 14.6.1, 14.7.1, 14.8.1, 14.9.2, 15.0.3, 15.1.2, 15.2.1, 15.3.2, 15.4.1, 15.5.1, 15.6.1, 15.7.2, 15.8.1, 15.9.2, 16.0.2, 16.1.3

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/72f4776f-5450-4022-92dd-47ddaa91a5cd?source=api-prod

Data sources and licences

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Source: Wordfence

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Questions about this vulnerability

Which versions of Jetpack – WP Security, Backup, Speed, & Growth are affected?

Wordfence lists these affected versions: From 12.0, through 12.0.2; From 12.1, through 12.1.2; From 12.2, through 12.2.2; From 12.3, through 12.3.1; From 12.4, through 12.4.1; From 12.5, through 12.5.1; From 12.6, through 12.6.3; From 12.7, through 12.7.2; From 12.8, through 12.8.2; From 12.9, through 12.9.4; From 13.0, through 13.0.1; From 13.1, through 13.1.4; From 13.2, through 13.2.3; From 13.3, through 13.3.2; From 13.4, through 13.4.4; From 13.5, through 13.5.1; From 13.6, through 13.6.1; From 13.7, through 13.7.1; From 13.8, through 13.8.2; From 13.9, through 13.9.1; From 14.0, through 14.0; From 14.1, through 14.1; From 14.2, through 14.2.1; From 14.3, through 14.3; From 14.4, through 14.4.1; From 14.5, through 14.5; From 14.6, through 14.6; From 14.7, through 14.7; From 14.8, through 14.8; From 14.9, through 14.9.1; From 15.0, through 15.0.2; From 15.1, through 15.1.1; From 15.2, through 15.2; From 15.3, through 15.3.1; From 15.4, through 15.4; From 15.5, through 15.5; From 15.6, through 15.6; From 15.7, through 15.7.1; From 15.8, through 15.8; From 15.9, through 15.9.1; From 16.0, through 16.0.1; From 16.1, through 16.1.2. Use the version checker above to compare your installed release with this report.

Is a fix available for Jetpack – WP Security, Backup, Speed, & Growth?

Wordfence reports a fix for this issue in Jetpack – WP Security, Backup, Speed, & Growth. It lists these fixed versions: 12.0.3, 12.1.3, 12.2.3, 12.3.2, 12.4.2, 12.5.2, 12.6.4, 12.7.3, 12.8.3, 12.9.5, 13.0.2, 13.1.5, 13.2.4, 13.3.3, 13.4.5, 13.5.2, 13.6.2, 13.7.2, 13.8.3, 13.9.2, 14.0.1, 14.1.1, 14.2.2, 14.3.1, 14.4.2, 14.5.1, 14.6.1, 14.7.1, 14.8.1, 14.9.2, 15.0.3, 15.1.2, 15.2.1, 15.3.2, 15.4.1, 15.5.1, 15.6.1, 15.7.2, 15.8.1, 15.9.2, 16.0.2, 16.1.3. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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