IkaIka RSS Reader vulnerable to cross-site scripting


IkaIka RSS Reader contains a cross-site scripting vulnerability (CWE-79), due to the improper processing of RSS registration.

LAC Co., Ltd. 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 5.4 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 5.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

IkaIka Software Co., Ltd.
  • IKaIKa RSS Reader all versions


If a malicious RSS feed is loaded into the product, an arbitrary script may be executed on the web browser where the product is running.

[Do not use IkaIka RSS Reader]
Please stop use of IkaIka RSS Reader.
The developer has stopped distributing the product.
Vendor Information

IkaIka Software Co., Ltd.
CWE (What is CWE?)

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

  1. CVE-2021-20752

  1. JVN : JVN#15185184
Revision History

  • [2021/06/30]
      Web page was published