CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
58.3%
Symfony is a PHP framework for web and console applications and a set of
reusable PHP components. When authenticating users Symfony by default
regenerates the session ID upon login, but preserves the rest of session
attributes. Because this does not clear CSRF tokens upon login, this might
enables same-site attackers to bypass the CSRF protection mechanism by
performing an attack similar to a session-fixation. This issue has been
fixed in the 4.4 branch.