CVE-2020-36565

Directory traversal on Windows in github.com/labstack/echo/v4

MEDIUM
5.3
CVSS Score
Published: December 7, 2022 at 04:14 PM UTC
Updated: June 17, 2026 at 03:15 AM UTC
2 products affected across 2 vendorsEchoEcho· also runs on 1 platform

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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
SSVC
PoC

Description

Due to improper sanitization of user input on Windows, the static file handler allows for directory traversal, allowing an attacker to read files outside of the target directory that the server has permission to read.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.2.0
Affected range stops below 4.2.0, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
v < 4.1.18-0.20201215153152-4422e3b66b9f
Affected range stops below 4.1.18-0.20201215153152-4422e3b66b9f, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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