Zammad: Account takeover via unverified email matching during SSO auto-link
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| zammad | zammad | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
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| Zammad | Zammad |
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No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.356% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Zammad
Zammad zammad |
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| Vendors & Products |
Zammad
Zammad zammad |
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| Description | Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when the "Automatic account link on initial logon" setting is enabled, Zammad binds an incoming third-party (SSO) identity to an existing local account by matching the email address the identity provider reports, without verifying that the provider actually confirmed ownership of that email. An attacker who controls any identity at a configured provider, including, by default, any Azure AD tenant via Zammad's multi-tenant Microsoft 365 /common app registration, can set that identity's email to a victim's address, authenticate, and be logged in as the victim. This bypasses the victim's local password entirely and affects any existing account, including agents and administrators. Zammad will honor the xms_edov ID token claim when email verification is required in the Microsoft 365 setting, treating a missing claim as unverified. This issue is fixed in version 7.1.2. | |
| Title | Zammad: Account takeover via unverified email matching during SSO auto-link | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV4_0
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