CVE-2017-11357
Progress Telerik Ui For Asp.Net Ajax ≤ 2020.1.114
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2017-11357 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Progress Telerik Ui For Asp.Net Ajax. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 0.4% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 contains an unrestricted file upload vulnerability in the RadAsyncUpload component. The component fails to properly validate or restrict user-supplied input, enabling attackers to supply arbitrary files. This issue is tracked as CWE-434 and carries a CVSS 3.1 base score of 9.8 reflecting network-accessible, unauthenticated exploitation with high impact on confidentiality, integrity, and availability.
Remote attackers can send crafted requests directly to the RadAsyncUpload handler to upload malicious files to the server or achieve arbitrary code execution without authentication or user interaction. Successful exploitation grants full control over the affected web application and underlying host.
Telerik advisory documentation describes the root cause as an insecure direct object reference in the upload control and states that the issue is resolved in R2 2017 SP2. The vulnerability appears in the CISA Known Exploited Vulnerabilities catalog, and public exploit code has been published on Exploit-DB.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2017-2986
Vulnerability Data
Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user input to RadAsyncUpload, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.
- CWE(s)
- KEV Date Added
- 26 January 2023
Related Threats
Threat-Actor AttributionAI
MITRE ATT&CK Enterprise Techniques
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Affected Assets
Mitigating Controls
Control response
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V5.1.1
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Hardened configuration baselines can enforce allowed file types and processing rules.
Restricting execution of unauthorized software directly blocks dangerous uploaded files from running.
Secure development practices include input validation and file-type restrictions that prevent this weakness.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.