What is CVE-2020-36973?

CVE-2020-36973 is a medium-severity vulnerability in Michalc Pdw File Browser, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2026-01-28.

How severe is CVE-2020-36973?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Arbitrary file upload in Michalc Pdw File Browser

CVE-2020-36973

PDW File Browser 1.3 contains a remote code execution vulnerability that allows authenticated users to upload and rename webshell files to arbitrary web server locations. Attackers can upload a .txt webshell, rename it to .php, and move it to accessible directories using double-encoded path traversal techniques.

Vulnerability class: Unrestricted File Upload

EPSS: 0.004 (34.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Michalc Pdw File Browser — versions <=1.3

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2020-36973?: CVE-2020-36973 is a medium-severity vulnerability in Michalc Pdw File Browser, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2026-01-28.
How severe is CVE-2020-36973?: Medium severity. CVSS v3 base score is 6.5 out of 10.