{"id":"CVE-2026-3906","aliases":["BIT-wordpress-2026-3906","BIT-wordpress-multisite-2026-3906","DEBIAN-CVE-2026-3906","EUVD-2026-11134","GHSA-6x83-fcf5-r65g","UBUNTU-CVE-2026-3906"],"status":"published","title":"WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API","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.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0035,"percentile":0.28913,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-862"],"published":"2026-03-11T09:25:44Z","modified":"2026-10-17T13:00:03Z","fixes":[{"ecosystem":"Bitnami","package":"wordpress","fixed_in":["6.9.2"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"wordpress-multisite","fixed_in":["6.9.2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"wordpress","fixed_in":["6.9.4+dfsg1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"wordpress","ranges":[{"type":"SEMVER","events":[{"introduced":"6.9.0"},{"fixed":"6.9.2"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"wordpress-multisite","ranges":[{"type":"SEMVER","events":[{"introduced":"6.9.0"},{"fixed":"6.9.2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.4+dfsg1-1"}]}],"versions":["6.8.1+dfsg1-1","6.8.3+dfsg1-1","6.9+dfsg1-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3+dfsg-1","4.3.1+dfsg-1","4.4+dfsg-1","4.4.1+dfsg-1","4.4.2+dfsg-1","4.4.2+dfsg-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.2+dfsg-2","4.8.3+dfsg-1","4.9.1+dfsg-1","4.9.2+dfsg-1","4.9.4+dfsg-1","4.9.5+dfsg1-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.2+dfsg1-1","5.2.4+dfsg1-1","5.3.2+dfsg1-1","5.3.2+dfsg1-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.7.1+dfsg1-2ubuntu1","5.8.1+dfsg1-2ubuntu1","5.8.2+dfsg1-1ubuntu1","5.8.3+dfsg1-1ubuntu1","5.8.3+dfsg1-1ubuntu1.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.2+dfsg1-1ubuntu1","6.4.3+dfsg1-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.7.2+dfsg1-1.1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.7.2+dfsg1-1.1ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.7.2+dfsg1-1.1ubuntu1","6.7.2+dfsg1-1.1ubuntu2"]}],"products":[{"vendor":"wordpress foundation","product":"wordpress"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/a69782f0-aa61-4049-8339-7f27f4b6c36b?source=cve","tags":["web"]},{"url":"https://core.trac.wordpress.org/changeset/61888","tags":["web","report"]},{"url":"https://core.trac.wordpress.org/browser/trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php#L562","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3906","tags":["web"]},{"url":"https://github.com/advisories/GHSA-6x83-fcf5-r65g"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-3906","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-3906","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-3906","tags":["report"]},{"url":"https://wordpress.org/news/2026/03/wordpress-6-9-2-release/","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-3906","title":"WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API","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.","status":"published","published":"2026-03-11T09:25:44.13Z","modified":"2026-03-11T13:18:53.88Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T13:49:09.229322Z"}],"euvd":[{"id":"EUVD-2026-11134","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.","status":"published","published":"2026-03-11T09:25:44Z","modified":"2026-03-11T13:18:53Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:25:37.650533Z"}],"ghsa":[{"id":"GHSA-6x83-fcf5-r65g","title":"WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes...","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.","status":"published","published":"2026-03-11T12:31:22Z","modified":"2026-03-11T12:31:29Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:06:33.767052Z"}],"nvd":[{"id":"CVE-2026-3906","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.","status":"published","published":"2026-03-11T10:16:14.217Z","modified":"2026-06-17T10:44:24.27Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:12:08.98071Z"}],"osv":[{"id":"DEBIAN-CVE-2026-3906","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.","status":"published","published":"2026-03-11T10:16:14.217Z","modified":"2026-10-01T03:02:39.075588335Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-3906","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.","status":"published","published":"2026-03-11T10:16:00Z","modified":"2026-10-17T13:00:03.040379121Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:56:16.686388Z"},{"id":"BIT-wordpress-2026-3906","title":"WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API","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.","status":"published","published":"2026-03-13T09:17:59.157Z","modified":"2026-03-14T01:55:59.480921Z","updated_at":"2026-11-02T15:28:36.455807Z"},{"id":"BIT-wordpress-multisite-2026-3906","title":"WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API","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.","status":"published","published":"2026-03-13T09:17:58.886Z","modified":"2026-03-14T01:55:59.480921Z","updated_at":"2026-11-02T15:28:36.455807Z"}]}}