CVE-2023-3670 | Codesys: Vulnerability in CODESYS Development System and CODESYS Scripting

In CODESYS Development System 3.5.9.0 to 3.5.17.0 and CODESYS Scripting 4.0.0.0 to 4.1.0.0 unsafe directory permissions would allow an attacker with local access to the workstation to place potentially harmful and disguised scripts that could be executed by legitimate users.

Published: 2023-07-28 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-3670 is rated Low Risk (31.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-3670

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.07% 0.03% -0.03%
2 2025-03-29 0.03% 0.07% +0.04%
3 2025-03-17 — 0.03% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-3670

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.3 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.3 5.9 [email protected]

Weakness enumeration for CVE-2023-3670

Affected software / configurations for CVE-2023-3670

Vendor Product Version Raw CPE
codesys development_system >= 3.5.9.0, < 3.5.17.0 cpe:2.3:a:codesys:development_system:*:*:*:*:*:*:*:*
codesys scripting >= 4.0.0.0, < 4.1.0.0 cpe:2.3:a:codesys:scripting:*:*:*:*:*:*:*:*

References for CVE-2023-3670

URL Tags
https://cert.vde.com/en/advisories/VDE-2023-024 Third Party Advisory
cvelogic Threat Intelligence