Drupal Open Social SA-CONTRIB-2019-075 Session Fixation Vulnerability



Date Discovered

November 6, 2019


Drupal Open Social is prone to a session-fixation vulnerability. An attacker can exploit this issue to hijack an arbitrary session and gain unauthorized access to the affected application. Drupal Open Social 8.x-7.0, and 8.x-6.0 through 8.x-6.4 are vulnerable.

Technologies Affected

  • Drupal Open Social 8.x-6.0
  • Drupal Open Social 8.x-6.4
  • Drupal Open Social 8.x-7.0


Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Permitting local access to trusted individuals only will greatly prove to mitigate the likelihood of exploitation.

Run all software as a nonprivileged user with minimal access rights.
To limit the impact of a successful exploit, run server software with the least privileges required and in restricted environments while still maintaining functionality.

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Updates are available. Please see the references or vendor advisory for more information.



Heine of the Drupal Security Team

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