CVE-2026-55186

MEDIUM 4.2

Silverstripe MFA: Can bypass MFA during password reset flow

CVSS Score

4.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-288
Vendor	silverstripe
Product	silverstripe-mfa
Published	Nov 3, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

silverstripe / silverstripe-mfa

< 6.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/silverstripe/silverstripe-mfa/security/advisories/GHSA-68wq-phq7-p2vg github.com: https://github.com/silverstripe/silverstripe-framework/pull/11686 github.com: https://github.com/silverstripe/silverstripe-mfa/pull/603 github.com: https://github.com/silverstripe/silverstripe-framework/commit/4b5cbd7ddf68721d8119583f0b9c04d4b4adc704 github.com: https://github.com/silverstripe/silverstripe-mfa/commit/04a102b662ac2f555acc26f8d2e2d8dab3937a6a github.com: https://github.com/silverstripe/silverstripe-mfa/releases/tag/6.0.0 silverstripe.org: https://www.silverstripe.org/download/security-releases/cve-2026-55186