Vulnerability details
CVE-2026-111626
Webreaper Damselfly
Webreaper Damselfly through 4.5.3 Missing Authentication on REST API Controllers
CVSS 4.0
9.3Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Webreaper | Damselfly | v ≤ 4.5.3 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://hackmd.io/@hieuPenguinnn/damselfly-api-missing-authorization third-party-advisory
- https://github.com/Webreaper/Damselfly/blob/4.5.3/Damselfly.Web.Server/Controllers/UserManagementController.cs#L8-L53 technical-description
- https://github.com/Webreaper/Damselfly/blob/4.5.3/Damselfly.Web.Server/Program.cs#L238-L242 technical-description
- https://github.com/Webreaper/Damselfly/issues/409 issue-tracking
- https://www.vulncheck.com/advisories/webreaper-damselfly-through-4.5.3-missing-authentication-on-rest-api-controllers third-party-advisory
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Details
- Published
- 2026-10-16
- Last updated
- 2026-10-17
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 24 · Low
Exploit prediction (EPSS)
0.44%
Probability of exploitation in 30 days
38.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-306Missing Authentication for Critical Function