Reported vulnerability

WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API

Published 10 Mar 2026

Updated 6 Apr 2026

CVE-2026-3906

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

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Wordfence advisory

medium · CVSS 4.3

WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API `create_item_permissions_check()` method in the comments controller did not verify that the authenticated user has `edit_post` permission on the target post when creating a note. This makes it possible for authenticated attackers with Subscriber-level access to create notes on any post, including posts authored by other users, private posts, and posts in any status.

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

WordPress

Software: WordPress Core · wordpress
Affected versions: From 6.9, through 6.9.1
Fix availability: Fix available
Fixed versions: 6.9.2

Recommended action

Update to version 6.9.2, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/a69782f0-aa61-4049-8339-7f27f4b6c36b?source=api-prod

Data sources and licences

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Source: Wordfence

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Questions about this vulnerability

Which versions of WordPress are affected?

Wordfence lists these affected versions: From 6.9, through 6.9.1. Use the version checker above to compare your installed release with this report.

Is a fix available for WordPress?

Wordfence reports a fix for this issue in WordPress. It lists these fixed versions: 6.9.2. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed WordPress version?

In WordPress, open Dashboard > Updates to find your installed WordPress version.

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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