Administrative access via unguarded MFA key reset
Published Mar 5, 2026 · Updated Mar 5, 2026
MFA bypass in EC-CUBE 4.1, 4.2, and 4.3 allows remote authenticated users to access the administrative page without a second factor. TwoFactorAuthListener exempts admin_two_factor_auth_set from MFA enforcement, while its controller accepts key setup even when the administrator already has a key. A valid administrator ID and password are required; the exposed enrollment path lets an unverified session replace the MFA key and obtain administrative access.
Summary
What happened
MFA bypass in EC-CUBE 4.1, 4.2, and 4.3 allows remote authenticated users to access the administrative page without a second factor. TwoFactorAuthListener exempts admin_two_factor_auth_set from MFA enforcement, while its controller accepts key setup even when the administrator already has a key. A valid administrator ID and password are required; the exposed enrollment path lets an unverified session replace the MFA key and obtain administrative access.
The record
- CVE
- CVE-2026-30777
- Published
- Mar 5, 2026
- Updated
- Mar 5, 2026
- Vendor
- EC-CUBE CO.,LTD.
- Product
- EC-CUBE
- Classifications
- CWE-288, T1078, T1556.006
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 5, 2026CVE publishedPublication date reported by the CVE source.
- Mar 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=prior to 4.1.2-p5
- Affected versionversion=prior to 4.2.3-p2
- Affected versionversion=prior to 4.3.1-p1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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