CVE-2026-55186
Published:November 03, 2026
Updated:November 03, 2026
Silverstripe MFA provides multi-factor authentication for Silverstripe CMS. Prior to 6.0.0, the CMS 5 password reset flow can issue a logged-in session after a user changes a password but before the user's configured multi-factor authentication challenge is completed. An attacker with access to the user's email account can follow the reset flow and bypass the additional authentication factor. CMS 6 is not affected. This issue is fixed in version 6.0.0.
Affected Packages
https://github.com/silverstripe/silverstripe-mfa.git (GITHUB):
Affected version(s) >=3.0.0-rc1 <6.0.0 || >=4.0.0-beta1 <6.0.0 || >=5.0.0-beta1 <6.0.0 || >=6.0.0-alpha1 <6.0.0Fix Suggestion:
Update to version 6.0.0silverstripe/mfa (PHP):
Affected version(s) >=6.0.0-alpha1 <6.0.0 || >=5.0.0-beta1 <6.0.0 || >=3.0.0-rc1 <6.0.0 || >=4.0.0-beta1 <6.0.0Fix Suggestion:
Update to version 6.0.0silverstripe/mfa (PHP):
Affected version(s) >=3.0.0-rc1 <6.0.0Fix Suggestion:
Update to version 6.0.0Related Resources (9)
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Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Authentication Bypass Using an Alternate Path or Channel