CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2020-27304
Critical (9.8). EPSS 3.2% chance of exploitation in the next 30 days.
The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the built-in HTTP form-based file upload mechanism, via the mg_handle_form_request API. Web applications that use the file upload form handler, and use parts of the user-controlled filename in the output path, are susceptible to directory traversal
Severity
- EPSS
- 3.2% chance of exploitation in the next 30 days; higher than 88% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-23
- Published
- Modified
- Record from
- the NVD, synced
Affected
- civetweb_project:civetweb
- siemens:sinec_infrastructure_network_services
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ
- https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf