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

CVE-2019-13645

Severity Medium
Score 5.4/10

Summary

Firefly III before 4.7.17.3 is vulnerable to stored XSS due to lack of filtration of user-supplied data in image file names. The JavaScript code is executed during "attachments/edit/$file_id$" attachment editing. NOTE: It is asserted that an attacker must have the same access rights as the user in order to be able to execute the vulnerability.

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

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.

Advisory Timeline

  • Published