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URL Redirection to Untrusted Site ('Open Redirect')


Severity Medium
Score 6.1/10


A flaw was found in Moodle before 3.1.18, 3.2.0 through 3.4.8, 3.5.x before 3.5.6 and 3.6.x before 3.6.4. The form to upload cohorts contained a redirect field, which was not restricted to internal URLs.

  • LOW
  • LOW
  • NONE
  • LOW
  • NONE

CWE-601 - Open Redirect

An open redirect attack employs a URL parameter, HTML refresh tags, or a DOM based location change to exploit the trust of a vulnerable domain to direct the users to a malicious website. The attack could lead to higher severity vulnerabilities such as unauthorized access control, account takeover, XSS, and more.

Advisory Timeline

  • Published