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

CVE-2026-45348

Low
0/10

Summary

The `packages.js` template at `src/pyload/webui/app/themes/modern/templates/js/packages.js:172` interpolates a stored link URL into a template literal inside single-quoted HTML and then writes the result to the DOM via `$(div).html(html)`. No escaping runs between the API value and `innerHTML`. An attacker (Alice) who can submit a package link puts a single quote plus event handler into the URL, breaks out of the attribute, and executes JavaScript in every operator's browser that opens the downloads view. The theme does not set a Content Security Policy that restricts inline script or event handlers.

  • 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