CVE-2026-111626
Webreaper Damselfly through 4.5.3 Missing Authentication on REST API Controllers
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
Webreaper Damselfly through 4.5.3 contains an authentication bypass vulnerability that allows unauthenticated attackers to access all /api/* routes because controller authorization attributes are commented out. Attackers can send PUT /api/users with Admin roles to create administrator accounts, or POST /api/users to reset any user's password, gaining full control.
| CWE | CWE-306 |
| Vendor | webreaper |
| Product | damselfly |
| 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:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Webreaper / Damselfly
0 ≤ 4.5.3
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/damselfly-api-missing-authorization github.com: https://github.com/Webreaper/Damselfly/blob/4.5.3/Damselfly.Web.Server/Controllers/UserManagementController.cs#L8-L53 github.com: https://github.com/Webreaper/Damselfly/blob/4.5.3/Damselfly.Web.Server/Program.cs#L238-L242 github.com: https://github.com/Webreaper/Damselfly/issues/409 vulncheck.com: https://www.vulncheck.com/advisories/webreaper-damselfly-through-4.5.3-missing-authentication-on-rest-api-controllers
Credits
hieuPenguinnn