How to fix CVE-2020-36973?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls.

Is PHP affected by CVE-2020-36973?

Organizations using PDW File Browser 1.3 should be aware of notable risk from CVE-2020-36973, a unrestricted file upload vulnerability rated CVSS 6.5. This could allow unauthorized file access. Proof-of-concept code is publicly available.

CVE-2020-36973

MEDIUM

2026-01-28 [email protected]

6.5

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 29, 2026 - 16:31 vuln.today

Public exploit code

CVE Published

Jan 28, 2026 - 18:16 nvd

MEDIUM 6.5

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.

Analysis

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. [CVSS 6.5 MEDIUM]

Technical Context

Classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). 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.

Affected Products

PDW File Browser 1.3 contains a remote code execution vulnerability that allows authenticated users to upload and rename webshell files to arbitrary w

Remediation

Monitor vendor advisories for a patch. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +32

POC: +20

CVE-2020-36973 vulnerability details – vuln.today

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CVE-2020-36973

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CVE-2020-36973

CVSS Vector

Lifecycle Timeline

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External POC / Exploit Code