Silverstripe MFA: Can bypass MFA during password reset flow

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55186
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-03 21:17:38 UTC
Updated2026-11-03 23:17:48 UTC
DescriptionSilverstripe 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.

Risk And Classification

Primary CVSS: v3.1 4.2 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.002780000 probability, percentile 0.203990000 (date 2026-11-04)

Problem Types: CWE-288 | CWE-288 CWE-288: Authentication Bypass Using an Alternate Path or Channel

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Silverstripe Silverstripe-mfa affected < 6.0.0 Not specified

References

ReferenceSourceLinkTags
www.silverstripe.org/download/security-releases/cve-2026-55186 [email protected] www.silverstripe.org
github.com/silverstripe/silverstripe-mfa/security/advisories/GHSA-68wq-p... [email protected] github.com
github.com/silverstripe/silverstripe-mfa/releases/tag/6.0.0 [email protected] github.com
github.com/silverstripe/silverstripe-framework/pull/11686 [email protected] github.com
github.com/silverstripe/silverstripe-mfa/pull/603 [email protected] github.com
github.com/silverstripe/silverstripe-mfa/commit/04a102b662ac2f555acc26f8... [email protected] github.com
github.com/silverstripe/silverstripe-framework/commit/4b5cbd7ddf68721d81... [email protected] github.com
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