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CVE-2018-1000088: XSS on authorization consent view

March 13, 2018 (updated April 11, 2018)

Stored XSS on the OAuth Client’s name will cause users being prompted for consent via the implicit grant type to execute the XSS payload. The XSS attack could gain access to the user’s active session, resulting in account compromise. Any user is susceptible if they click the authorization link for the malicious OAuth client. Because of how the links work, a user cannot tell if a link is malicious or not without first visiting the page with the XSS payload. In addition, there is stored XSS in the native_redirect_uri form element.

References

  • blog.justinbull.ca/cve-2018-1000088-stored-xss-in-doorkeeper/
  • github.com/doorkeeper-gem/doorkeeper/issues/969
  • github.com/doorkeeper-gem/doorkeeper/pull/970

Code Behaviors & Features

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Affected versions

All versions starting from 2.1.0 before 4.2.6

Fixed versions

  • 4.2.6

Solution

Upgrade to version 4.2.6 or above.

Impact 6.1 MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

gem/doorkeeper/CVE-2018-1000088.yml

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