CVE-2026-3906 (GCVE-0-2026-3906)

Vulnerability from cvelistv5 – Published: 2026-03-11 09:25 – Updated: 2026-03-11 13:18
VLAI
Title
WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API
Summary
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
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 13:18 UTC
CWE
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2367 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
WordPress Foundation WordPress Affected: 6.9 , ≤ 6.9.1 (semver)
guessed Create a notification for this product.
Credits
kaminuma
Show details on NVD website
To clipboard 

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Sightings

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Nomenclature

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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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