CVE-2026-72831
The Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply the additional target/field/super-admin checks enforced by the dedicated Users and Groups API controllers. An authenticated account with api.access, admin.login, and users.update permissions (but without api.users.write or admin.super) can use the generic /api/v1/flex-objects/user-accounts endpoint to change a super administrator's password, or the /api/v1/flex-objects/user-groups endpoint to grant its group admin.super, resulting in full site takeover. Fixed in Flex Objects 1.4.7.
脆弱性の種類
The Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply the additional target/field/super-admin checks enforced by the dedicated Users and Groups API controllers. An authenticated account with api.access, admin.login, and users.update permissions (but without api.users.write or admin.super) can use the generic /api/v1/flex-objects/user-accounts endpoint to change a super administrator's password, or the /api/v1/flex-objects/user-groups endpoint to grant its group admin.super, resulting in full site takeover. Fixed in Flex Objects 1.4.7.
参考情報
- https://github.com/getgrav/grav-plugin-admin2/commit/a0bf26f7e5d7a98894b7cd2b8c5afe419b264e53
- https://github.com/getgrav/grav-plugin-api/commit/8071c10bc3a4743a4b8cf003dfb1644d6680c2ea
- https://github.com/getgrav/grav/commit/ad9709f865b09b68798fb1ac375b484a8cc1d892
- https://github.com/getgrav/grav/security/advisories/GHSA-pc8m-jxvh-vmrc
- https://github.com/trilbymedia/grav-plugin-flex-objects/commit/0b384f5b0e73b1ad9dd29c70185407895ea3b09f
- https://www.vulncheck.com/advisories/grav-through-authentication-bypass-via-flex-objects