CVE-2026-111626
Webreaper Damselfly through 4.5.3 Missing Authentication on REST API Controllers
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 16, 2026
- Updated
- Oct 16, 2026
- Reserved
- Oct 16, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
DamselflyWebreaper |
|
References
- https://hackmd.io/@hieuPenguinnn/damselfly-api-missing-authorizationthird-party-advisory
- https://github.com/Webreaper/Damselfly/blob/4.5.3/Damselfly.Web.Server/Controllers/UserManagementController.cs#L8-L53technical-description
- https://github.com/Webreaper/Damselfly/blob/4.5.3/Damselfly.Web.Server/Program.cs#L238-L242technical-description
- https://github.com/Webreaper/Damselfly/issues/409issue-tracking
- VulnCheck Advisory: Webreaper Damselfly through 4.5.3 Missing Authentication on REST API Controllersthird-party-advisory
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