Article - CS358789

Apache Log4j 2.x Security Vulnerabilities (CVE-2021-44228, CVE-2021-45046, CVE-2021-45105, CVE-2021-44832) - Impact on Windchill and FlexPLM

Modified: 22-Dec-2022   

Applies To

  • Windchill PDMLink 11.0 M030
  • FlexPLM 11.0 M030
  • FlexPLM 11.1 M010
  • FlexPLM 11.1 M020
  • Windchill PDMLink 11.1 M020
  • Windchill PDMLink
  • FlexPLM
  • FlexPLM
  • FlexPLM
  • Windchill PDMLink
  • Windchill PDMLink


A critical zero-day vulnerability has been reported in the 3rd party library log4j.
This article has been created to provide customers with information and recommended actions.
Analysis and investigation is on-going:
  • Check this article regularly for additional updates to ensure you have the latest details.
Currently, following vulnerabilities are known:
  • CVE-2021-44228
    Base CVSS Score: 10.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • The following vulnerability has also been reported which is related to the above CVE. It is recommended to also address on priority.

    Base CVSS Score: 9.0  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
    Vulnerable Apache log4j versions for the CVEs above: all versions from 2.0-beta9 to 2.15.0
  • The following CVE was reported by Apache against log4j versions 2.0-beta9 to 2.16:
    Base CVSS Score:7.5   CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Vulnerable Apache Log4j versions for the CVE: 2.0-beta7 to 2.16
  • The following CVE was reported by Apache against Log4j 2.17:
    Base CVSS Score:6.6 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
    Vulnerable Apache Log4j versions for the CVE:2.0-beta7 to 2.17.0



    • Due to the criticality of this reported vulnerability, PTC STRONGLY RECOMMENDS taking IMMEDIATE action to ensure all impacted Windchill instances are secure.
    • There are no known exploits reported for Windchill at this time.
      Investigation is on-going to identify any potential attack surface.
    • All instances (dev, test and prod) are impacted and any Windchill deployment of the impacted releases should be updated as per recommendations below. This includes updating all Windchill file servers.



      • Windchill includes the log4j library for native logging capabilities. (see below for impacts related to supported 3rd party bundled components that integrate directly with Windchill)
      Windchill ReleaseApache Log4j versionAdditional Information
      11.0 M030log4j 1.x
      Not vulnerable.  Refer to Article CS359009  for more information

      * PTC continuously monitors and analyzes supported Windchill releases for any reported critical or high CVE.

      11.1 M020 and earlier

      FlexPLM 11.1 M010
      FlexPLM 11.1 M020
      FlexPLM 11.2.1
      FlexPLM 12.0.0
      log4j 1.xNot vulnerable.  Refer to Article
      This is a printer-friendly version of Article 358789 and may be out of date. For the latest version click CS358789