Canon laser printers and small office multifunctional printers vulnerable to cross-site scripting


Multiple Canon laser printers and small office multifunctional printers contain a stored cross-site scripting vulnerability (CWE-79).

Murashima Masahiro of IERAE SECURITY INC. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 4.8 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 3.5 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

  • (multiple product)

A wide range of the products is affected.
For more information, refer to the following information provided by the developer.
  *Canon USA:Canon Laser Printer and Small Office Multifunctional Printer related to cross-site scripting
  *Canon Europe: Cross-site scripting vulnerability for laser printers and multifunction devices for small offices – 11 January 2022

An arbitrary script may be executed on the web browser of the user who is accessing the product settings screen.

[Update the firmware]
Update the firmware to the latest version according to the information provided by the developer.
Vendor Information

CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2021-20877

  1. JVN : JVN#64806328
Revision History

  • [2022/01/19]
      Web page was published