Описание
Craft CMS: Authorization bypass: view-only Categories user can modify category structure via structures/move-element
A control-panel user who holds only the viewCategories permission for a category group (and not saveCategories) can permanently modify that group's category structure — reordering and re-parenting categories via the structures/move-element action.
A read-time authorization grant that a write endpoint later trusts. For categories, the structureEditable flag is computed from the view permission (src/elements/Category.php:205) instead of the save permission (entries correctly use saveEntries — src/elements/Entry.php:341). When the read-only category index renders, craft\base\Element::indexHtml() calls Craft::$app->getSession()->authorize('editStructure:<structureId>'); StructuresController then authorizes the structure-mutating action solely on that session grant, with no canSave re-check.
Verified on Craft CMS 5.10.5. Same class as the moderate-severity authorization bypasses fixed in 5.10.3 and 5.10.5; this is a distinct, unpatched instance.
Impact
A low-privileged, authenticated user (view-only on a category group) can persistently alter the sibling ordering and parent/child nesting of the category taxonomy. Because a category’s URI is derived from its position in the structure (ancestor slugs), moving a category changes its URL and the URLs of its descendants, and can corrupt any navigation/menus built from the category tree. This is an integrity/broken access-control issue: content that the user has no permission to modify is being modified. No confidentiality impact and no RCE; scope is content/taxonomy integrity.
Ссылки
- https://github.com/craftcms/cms/security/advisories/GHSA-xxpx-f366-4xpq
- https://nvd.nist.gov/vuln/detail/CVE-2026-72785
- https://github.com/craftcms/cms/commit/eb63721b8476ef53f21d7de53d156eef531cb57d
- https://github.com/craftcms/cms/releases/tag/4.18.2
- https://github.com/craftcms/cms/releases/tag/5.10.6
- https://www.vulncheck.com/advisories/craft-cms-before-authorization-bypass-via-structures-move-element
Пакеты
craftcms/cms
>= 5.0.0-RC1, < 5.10.6
5.10.6
Связанные уязвимости
Craft CMS 5.0.0-RC1 through 5.10.5 contains an incorrect authorization vulnerability. A control-panel user holding only the viewCategories permission (without saveCategories) for a category group can permanently modify that group's category structure — reordering and re-parenting categories — via the structures/move-element action. The structureEditable flag is computed from the view permission rather than the save permission, and the StructuresController authorizes the mutating action on that read-time session grant without a save re-check. Because a category's URI is derived from its position in the structure, moving a category changes its URL and those of its descendants and can corrupt navigation menus built from the category taxonomy. The issue is fixed in 5.10.6.