Skip to main content

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

CVE-2024-45046

Medium
5.4/10

Summary

PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In phpoffice/phpspreadsheet package versions through 1.29.0, and 2.0.0, "PhpSpreadsheet/Writer/Html.php" file doesn't sanitize spreadsheet styling information such as "font names", allowing an attacker to inject arbitrary JavaScript on the page. As a result, an attacker may use a crafted spreadsheet to fully take over a session of a user viewing spreadsheet files as HTML. All users are advised to upgrade. There are no known workarounds for this 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.

References

Advisory Timeline

  • Published