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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (39.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Michalc Pdw File Browser — versions <=1.3
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48987 (exploit)
- github.com/michalc/PDW-File-Browser (product)
- www.vulncheck.com/advisories/pdw-file-browser-remote-code-execution (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.