What is CVE-2021-36121?

CVE-2021-36121 is a high-severity vulnerability in Echobh Sharecare, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2021-07-13.

How severe is CVE-2021-36121?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Echobh Sharecare

CVE-2021-36121

An issue was discovered in Echo ShareCare 8.15.5. The file-upload feature in Access/DownloadFeed_Mnt/FileUpload_Upd.cfm is susceptible to an unrestricted upload vulnerability via the name1 parameter, when processing remote input from an authenticated user, leading to the ability for arbitrary files to be written to arbitrary filesystem locations via ../ Directory Traversal on the Z: drive (a hard-coded drive letter where ShareCare application files reside) and remote code execution as the ShareCare service user (NT AUTHORITY\SYSTEM).

Vulnerability class: Unrestricted File Upload

EPSS: 0.021 (80.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Echobh Sharecare — versions 8.15.5
N/a — versions n/a

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-36121?: CVE-2021-36121 is a high-severity vulnerability in Echobh Sharecare, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2021-07-13.
How severe is CVE-2021-36121?: High severity. CVSS v3 base score is 8.8 out of 10.