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Jetpack 14.5 — 16.1.2 - Reflected to Stored Cross-Site Scripting via Reader Repost Parameters

eda9ae01-cdc4-43e0-8a4c-1ec365939fa8Published · Updated

Action summary

Affected: ≤16.1.2Update to 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
Medium6.1
CVSS
6.1
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:R User interaction
Required
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
Required access
No account needed
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 in14.5.1 / 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 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 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.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to one of the following versions, or a newer patched version: 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 Cross-Site Scripting in versions 14.5 through 16.1.2 via the Reader repost initializer in the block editor bundles. The initializer reads the url, title, text, comment_content, and comment_author query parameters and interpolates them into block attributes without escaping or sanitization before calling resetEditorBlocks(). On WordPress 7.1, only title and url were demonstrated to persist into live executable markup; the other parameters did not produce a stored executable sink. This makes it possible for unauthenticated attackers to inject arbitrary web scripts into a post via a crafted link that, when opened and saved by a user with the unfiltered_html capability (administrator or editor by default), stores the payload in post_content where it executes in the browser of every subsequent visitor to the published post. The Blocks module must be active and the site must be Jetpack-connected or in offline mode for the vulnerable bundle to be enqueued.

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 (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting 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 medium, CVSS 6.1

  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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