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

72f4776f-5450-4022-92dd-47ddaa91a5cdPublished · Updated

Action summary

Affected: ≤16.1.2Update to 12.0.3 or 12.1.3 or 12.2.3 or 12.3.2 or 12.4.2 or 12.5.2 or 12.6.4 or 12.7.3 or 12.8.3 or 12.9.5 or 13.0.2 or 13.1.5 or 13.2.4 or 13.3.3 or 13.4.5 or 13.5.2 or 13.6.2 or 13.7.2 or 13.8.3 or 13.9.2 or 14.0.1 or 14.1.1 or 14.2.2 or 14.3.1 or 14.4.2 or 14.5.1 or 14.6.1 or 14.7.1 or 14.8.1 or 14.9.2 or 15.0.3 or 15.1.2 or 15.2.1 or 15.3.2 or 15.4.1 or 15.5.1 or 15.6.1 or 15.7.2 or 15.8.1 or 15.9.2 or 16.0.2 or 16.1.3 or newer

Fixed versions are per release branch: update to the fix for the branch you run.

All remediation steps
Watch plugin
Severity
High7.2
CVSS
7.2
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:H Privileges required
High
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-502 PHP Object Injection
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Jetpack – AI Agents & MCP, Security, Backup & Analytics jetpack

  1. Affected≤ 16.1.2
  2. Patched in12.0.3 / 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

Update to 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 or newer.

You are affected if you run ≤ 16.1.2. 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 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Jetpack – AI Agents & MCP, Security, Backup & Analytics.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. 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
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Jetpack – AI Agents & MCP, Security, Backup & Analytics to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Jetpack – AI Agents & MCP, Security, Backup & Analytics

All 33
More vulnerabilities in Jetpack – AI Agents & MCP, Security, Backup & Analytics
SeverityVulnerabilityCVEPublished
Medium5.3Missing Authorization
≤16.2Update to 16.3
CVE-2026-106601
Medium5.3Missing Authorization
≤16.2Update to 16.3
CVE-2026-106602
High7.216.1.2 - Unauthenticated Stored Cross-Site Scripting
16.1 – 16.1.2Update to 16.1.3
—
Medium6.616.1.2 - Authenticated (Administrator+) PHP Object Injection
16.1 – 16.1.2Update to 16.1.3
—
Medium6.616.1.2 - Authenticated (Administrator+) PHP Object Injection
16.1 – 16.1.2Update to 16.1.3
—

Same weakness (PHP Object Injection)

All PHP Object Injection
Other PHP Object Injection vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 7.2

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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