CVE-2021-34599

Improper Certificate Validation in CODESYS Git

HIGH
7.4
CVSS Score
Published: December 1, 2021 at 09:00 AM UTC
Updated: June 17, 2026 at 03:56 AM UTC
2 products affected across 1 vendorGitDevelopment System

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Severity
HIGH7.4
Exploit prediction
EPSS 0.5%

Description

Affected versions of CODESYS Git in Versions prior to V1.1.0.0 lack certificate validation in HTTPS handshakes. CODESYS Git does not implement certificate validation by default, so it does not verify that the server provides a valid and trusted HTTPS certificate. Since the certificate of the server to which the connection is made is not properly verified, the server connection is vulnerable to a man-in-the-middle attack.

Affected

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

v < 1.1.0.0CODESYS Git ≤ v < V1.1.0.0
Affected range stops below 1.1.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V1.1.0.0, so it looks safe — our inference, not a vendor statement
codesys-development-system (environment)
All versions

Remediation

No guide yet

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

CVSS

7.4HIGHCERTVDE
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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