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Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE-2024-40643

High
9.6/10

Summary

Joplin is a free, open-source note-taking and to-do application. Joplin fails to consider that "<" followed by a non-letter character will not be considered HTML as such it is possible to do a Cross-site Scripting (XSS) by putting an "illegal" tag within a tag. This issue affects @joplin/fork-htmlparser2 and htmlparser2 versions 3.0.0 prior to 5.0.0.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • REQUIRED
  • NONE
  • HIGH
  • HIGH

CWE-79 - Cross Site Scripting

Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.

References

Advisory Timeline

  • Published