CVE-2026-111653
53AIHub through 0.5.3 Missing Authentication via PUT /api/enterprises/:id
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
53AIHub through 0.5.3 contains a missing authentication vulnerability that allows unauthenticated attackers to overwrite any enterprise's profile by sending PUT requests to /api/enterprises/:id. Because UpdateEnterprise only enforces checks when IS_SAAS is true, attackers can enumerate sequential enterprise IDs and overwrite logos, display names and branding for defacement and phishing.
| CWE | CWE-306 |
| Vendor | 53ai |
| Product | 53aihub |
| Published | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
53AI / 53AIHub
0 ≤ 0.5.3
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/53aihub-unauth-cross-tenant-enterprise-update github.com: https://github.com/53AI/53AIHub/blob/v0.5.3/api/router/api.go#L54-L66 github.com: https://github.com/53AI/53AIHub/blob/v0.5.3/api/controller/enterprise.go#L122-L160 vulncheck.com: https://www.vulncheck.com/advisories/53aihub-through-0.5.3-missing-authentication-via-put-api-enterprises-id
Credits
hieuPenguinnn