CVE-2023-37551: CODESYS Files or Directories Accessible to External Parties in CmpApp

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-03 · updated 2026-06-17
Weakness: CWE-552

Description

In multiple Codesys products in multiple versions, after successful authentication as a user, specially crafted network communication requests can utilize the CmpApp component to download files with any file extensions to the controller. In contrast to the regular file download via CmpFileTransfer, no filtering of certain file types is performed here. As a result, the integrity of the CODESYS control runtime system may be compromised by the files loaded onto the controller.

Affected products

CODESYS Control for BeagleBone SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control For Empc-A/Imx6 Sl: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for IOT2000 SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for Linux SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for PFC100 SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for PFC200 SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for PLCnext SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for Raspberry Pi SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control for WAGO Touch Panels 600 SL: before 4.10.0.0 — fixed in 4.10.0.0
CODESYS Control RTE (SL): before 3.5.19.20 — fixed in 3.5.19.20
CODESYS Control Rte Sl (For Beckhoff Cx): before 3.5.19.20 — fixed in 3.5.19.20
CODESYS Control Runtime System Toolkit: before 3.5.19.20 — fixed in 3.5.19.20
CODESYS Control Win (SL): before 3.5.19.20 — fixed in 3.5.19.20
CODESYS Development System: before 3.5.19.20 — fixed in 3.5.19.20
CODESYS Hmi: before 3.5.19.20 — fixed in 3.5.19.20
CODESYS Safety SIL2: before 3.5.19.20 — fixed in 3.5.19.20

How to fix

Upgrade to a fixed version: CODESYS Control for BeagleBone SL 4.10.0.0; CODESYS Control For Empc-A/Imx6 Sl 4.10.0.0; CODESYS Control for IOT2000 SL 4.10.0.0; CODESYS Control for Linux SL 4.10.0.0; CODESYS Control for PFC100 SL 4.10.0.0; CODESYS Control for PFC200 SL 4.10.0.0; CODESYS Control for PLCnext SL 4.10.0.0; CODESYS Control for Raspberry Pi SL 4.10.0.0; CODESYS Control for WAGO Touch Panels 600 SL 4.10.0.0; CODESYS Control RTE (SL) 3.5.19.20; CODESYS Control Rte Sl (For Beckhoff Cx) 3.5.19.20; CODESYS Control Runtime System Toolkit 3.5.19.20. Check the vendor advisory for mitigations.

References

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