rwtxt vulnerable to cross-site scripting


rwtxt provided by Zack Scholl is a light-weight content management system (CMS) that enables to share and/or view any text saved online. rwtxt contains a cross-site scripting vulnerability (CWE-79).

Ito Reo of Mitsui Bussan Secure Directions, 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 6.1 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Zack Scholl
  • rwtxt prior to v1.8.6


An arbitrary script may be executed on the web browser of the user who is accessing the website using rwtxt.

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

Zack Scholl
CWE (What is CWE?)

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

  1. CVE-2021-20848

  1. JVN : JVN#22515597
Revision History

  • [2021/11/16]
      Web page was published