CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
EPSS
Percentile
75.9%
The OpenID module in Drupal 6.x before 6.18, and the OpenID module 5.x
before 5.x-1.4 for Drupal, violates the OpenID 2.0 protocol by not
verifying the openid.return_to value, which allows remote attackers to
bypass authentication by leveraging an assertion from an OpenID provider.