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

CVE-2026-44549

Low
0/10

Summary

Excel file attachments are previewed in an unsafe way. A crafted XLSX file payload can be used to cause the sheetjs function "sheet_to_html" to embed an XSS payload into the generated HTML. This is subsequently added to the DOM unsanitized via "@html" causing the payload to trigger. The affected versions are prior to 0.8.0.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • REQUIRED
  • LOW
  • HIGH
  • 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.

References

Advisory Timeline

  • Published