WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API
| CVE | CVE-2026-3906 |
|---|---|
| CVSS | 4.3 (Medium) |
| Publicly Published | March 10, 2026 |
| Last Updated | April 6, 2026 |
| Researcher |
kaminuma
|
Description
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.
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Vulnerability Details for WordPress
| Software Type | Core |
|---|---|
| Patched? | Yes |
| Remediation | Update to version 6.9.2, or a newer patched version |
| Affected Version |
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| Patched Version |
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