Authenticated webshell upload via unrestricted file types
Published Nov 18, 2025 · Updated Feb 18, 2026
Unrestricted file upload in Informática del Este WinPlus 24.11.27 allows remote authenticated users to upload a webshell by POST request. The /WinplusPortal/ws/sWinplus.svc/json/uploadfile endpoint accepts attacker-supplied files without restricting dangerous file types. Low-privilege application access is required, and successful exploitation stores attacker-controlled web content on the WinPlus server.
Summary
What happened
Unrestricted file upload in Informática del Este WinPlus 24.11.27 allows remote authenticated users to upload a webshell by POST request. The /WinplusPortal/ws/sWinplus.svc/json/uploadfile endpoint accepts attacker-supplied files without restricting dangerous file types. Low-privilege application access is required, and successful exploitation stores attacker-controlled web content on the WinPlus server.
The record
- CVE
- CVE-2025-41347
- Published
- Nov 18, 2025
- Updated
- Feb 18, 2026
- Vendor
- Informática del Este
- Product
- WinPlus
- Classifications
- CWE-434, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 18, 2025CVE publishedPublication date reported by the CVE source.
- Feb 18, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=24.11.27
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Technologies
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