Drupal 8 before 8.2.8 and 8.3 before 8.3.1 allows critical access bypass by authenticated users if the RESTful Web Services (rest) module is enabled and the site allows PATCH requests.
Severity
High 7.5
Published
20 Apr 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.6% in the next 30 daysHigher than 76% of CVEs. EPSS by FIRST, 11 Nov 2026
Attack
Over the network · Only under certain conditions · Needs a user account · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Sources
NVD
Affected software
Software
Affected versions
DrupalServers and applications · cpe:a:drupal:drupal