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.
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Fixes
Solution
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Workaround
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References
History
Fri, 14 Aug 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Grav through 2.0.11 Authentication Bypass via Flex Objects | |
| First Time appeared |
Getgrav
Getgrav grav |
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| Weaknesses | CWE-863 | |
| CPEs | cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Getgrav
Getgrav grav |
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| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-14T11:35:37.801Z
Reserved: 2026-08-10T15:12:59.509Z
Link: CVE-2026-72831
No data.
Status : Received
Published: 2026-08-14T12:16:46.400
Modified: 2026-08-14T12:16:46.400
Link: CVE-2026-72831
No data.
OpenCVE Enrichment
No data.
Weaknesses