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Vulnerability record · CVE-2020-36973 · published 28 January 2026

CVE-2020-36973: Unrestricted file upload vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.48% · top 60.8% CWE-434 · Unrestricted file upload Deferred
8.7CVSS 4.0 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/michalc/PDW-File-Browser
https://www.exploit-db.com/exploits/48987
https://www.vulncheck.com/advisories/pdw-file-browser-remote-code-execution
https://www.exploit-db.com/exploits/48987

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Source: NIST National Vulnerability Database (record CVE-2020-36973), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.