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Full vulnerability report · 2023
CVE-2023-3663High confidence

CODESYS: Missing integrity check in CODESYS Development System

CODESYS · CODESYS Development System

8.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SEVD-2023-192-04 · CSAF 2.0 · revision 8.1.0 · finalSchneider Electric CPCERTCODESYS Runtime Vulnerabilities
15 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • Schneider Electric HMISCU Controller All versions prior to v6.3.1
  • Schneider Electric Modicon Controller M241 All versions prior to v5.2.11.18
  • Schneider Electric Modicon Controller M251 All Versions prior to v5.2.11.18
  • Schneider Electric Modicon Controller M262 All versions prior to v5.2.8.12
  • Schneider Electric Modicon Controller M258 All Versions
  • Schneider Electric Modicon Controller LMC058 All Versions
  • Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 All versions prior to v1.76.14.1
  • Schneider Electric SoftSPS embedded in EcoStruxure™ Machine Expert All Versions prior to Machine Expert v2.2
  • Schneider Electric Vijeo Designer embedded in EcoStruxure™ Machine Expert All versions prior to v6.3.1
  • Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series All Versions prior to V6.3 HF3
  • Schneider Electric Easy Harmony HMIET6/HMIFT6 Magelis HMIGXU all versions prior to v2.0 HF2
  • Schneider Electric Magelis XBT series All Versions
Summary
The Notification Center of the CODESYS Development System receives messages without ensuring that the message was not modified during transmission. This finally enables MITMs code execution when the user clicks the Learn More button.
Remediation
Version 6.3.1 of Vijeo Designer includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/1054-vijeodesigner-hmi-software/#software-and-firmware On the engineering workstation, update to v6.3.1 of Vijeo Designer. In order to complete the update, connect to Harmony HMI and download the project file using Vijeo Designer v6.3.1.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-44307

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In CODESYS Development System versions from 3.5.11.20 and before 3.5.19.20 a missing integrity check might allow an unauthenticated remote attacker to manipulate the content of notifications received via HTTP by the CODESYS notification server.

What

In CODESYS Development System versions from 3.5.11.20 and before 3.5.19.20 a missing integrity check might allow an unauthenticated remote attacker to manipulate the content of notifications received via HTTP by the CODESYS notification server.

Why

The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In CODESYS Development System versions from 3.5.11.20 and before 3.5.19.20 a missing integrity check might allow an unauthenticated remote attacker to manipulate the content of notifications received via HTTP by the CODESYS notification server.

Why

The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Verification of Source of a Communication Channel → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-940 ↗

CWE-940: Improper Verification of Source of a Communication Channel. The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-940
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2024-0943CODESYS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, Dateien zu manipulieren oder einen Brute-Force-Angriff durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0632Multiples vulnérabilités dans les produits Schneider Electric

tice&p_File_Name=SEVD-2023-192-04.pdf Bulletin de sécurité Schneider Electric SEVD-2023-220-01 du 8 août 2023 https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-220-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-220-01.pdf Référence CVE CVE-2022-4046 https://www.cve.org/CVERecord?id=CVE-2022-4046 Référence CVE CVE-2022-45788 https://www.cve.org/CVERecord?id=CVE-2022-45788 Référence CVE CVE-2022-45789 https://www.cve.org/CVERecord?id=CVE-2022-45789 Référence CVE CVE-2023-28355 https://www.cve.org/CVERecord?id=CVE-2023-28355 Référence CVE CVE-2023-3662 https://www.cve.org/CVERecord?id=CVE-2023-3662 Référence CVE CVE-2023-3663 https://www.cve.org/CVERecord?id=CVE-2023-3663 Référence CVE CVE-2023-3669 https://www.cve.org/CVERecord?id=CVE-2023-3669 Référence CVE CVE-2023-3670 https://www.cve.org/CVERecord?id=CVE-2023-3670 Référence CVE CVE-2023-37545 https://www.cve.org/CVERecord?id=CVE-2023-37545 Référence CVE CVE-2023-37546 https://www.cve.org/CVERecord?id=CVE-2023-37546 Référence CVE CVE-2023-37547 https://www.cve.org/CVERecord?id=CVE-2023-37547 Référence CVE CVE-2023-37548 https://www.cve.org/CVERecord?id=CVE-2023-37548 Référence CVE CVE-2023-37549 https://www.cve.org/CVERecord?id=CVE-2023-37549 Référence CVE CVE-2023-37550 https://www.cve.org/CVERecord?id=CVE-2

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Schneider Electric HMISCU Controller All versions prior to v6.3.1; Schneider Electric Modicon Controller M241 All versions prior to v5.2.11.18; Schneider Electric Modicon Controller M251 All Versions prior to v5.2.11.18; Schneider Electric Modicon Controller M262 All versions prior to v5.2.8.12; Schneider Electric Modicon Controller M258 All Versions; Schneider Electric Modicon Controller LMC058 All Versions; Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 All versions prior to v1.76.14.1; Schneider Electric SoftSPS embedded in EcoStruxure™ Machine Expert All Versions prior to Machine Expert v2.2; Schneider Electric Vijeo Designer embedded in EcoStruxure™ Machine Expert All versions prior to v6.3.1; Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series All Versions prior to V6.3 HF3; Schneider Electric Easy Harmony HMIET6/HMIFT6 Magelis HMIGXU all versions prior to v2.0 HF2; Schneider Electric Magelis XBT series All Versions; Schneider Electric Easy Modicon M310 All versions prior to v3.1.5.82; Schneider Electric Vijeo Designer runtime Versions Prior to 6.3 SP2 installed on Schneider Electric Harmony iPC series; Schneider Electric Vijeo Designer runtime Versions Prior to 6.3 SP2 installed on Schneider Electric Harmony P6 series
Fixed
Schneider Electric HMISCU Controller 6.3.1; Schneider Electric Modicon Controller M241 5.2.11.18; Schneider Electric Modicon Controller M251 5.2.11.18; Schneider Electric Modicon Controller M262 5.2.8.12; Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 1.76.14.1; Schneider Electric SoftSPS embedded in EcoStruxure™ Machine Expert 2.2; Schneider Electric Vijeo Designer embedded in EcoStruxure™ Machine Expert 6.3.1; Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series iPC series with Vijeo Designer runtime V6.3 HF3; Vijeo Designer Basic v2.0 HF2; Schneider Electric Vijeo Designer runtime Version 6.3 SP2 installed on Schneider Electric Harmony iPC series; Schneider Electric Vijeo Designer runtime Version 6.3 SP2 installed on Schneider Electric Harmony P6 series; Schneider Electric Easy Modicon M310 version v3.1.5.82
Action
Version 6.3.1 of Vijeo Designer includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/1054-vijeodesigner-hmi-software/#software-and-firmware On the engineering workstation, update to v6.3.1 of Vijeo Designer. In order to complete the update, connect to Harmony HMI and download the project file using Vijeo Designer v6.3.1.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 3 Aug 2023 · Last source change 27 Feb 2025, 21:11 UTC · CWE-940 · Improper Verification of Source of a Communication Channel

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-44307
Product sourceVendor CSAF · Schneider Electric CPCERT
Remediation sourceVendor CSAF · Schneider Electric CPCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2023-44307↗Vendor CSAF · Schneider Electric CPCERT↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-3663 · cve.blacktree.nl