CVE-2026-3906

published 2026-03-11

CVE-2026-3906: 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…

Priority P4 24 medium 4.3 CVSS 3.1

AV N AC L PR L UI N S U C N I L A N

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
debian	wordpress	< wordpress 6.9.4+dfsg1-1 (forky)	wordpress 6.9.4+dfsg1-1 (forky)
wordpress	wordpress	>= 0 < 6.9.4+dfsg1-1	6.9.4+dfsg1-1
wordpress_foundation	wordpress	6.9 – 6.9.1	—

CVSS provenance

nvd v3.1 4.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

osv 4.3 MEDIUM

vendor_debian 4.3 LOW

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CWE-862