Password disclosure via cleartext OAuth2 setup storage
Published Feb 6, 2023 · Updated Mar 10, 2025
Cleartext password storage in Nextcloud Mail before 2.2.2 allows attackers with database access to read user passwords during OAuth2 setup. AccountForm submitted IMAP and SMTP password fields for XOAUTH2 accounts, and SetupService persisted them instead of leaving them empty until an access token arrived. Database access during the incomplete setup window is required, and the reported consequence is disclosure of the stored mail-account password.
Summary
What happened
Cleartext password storage in Nextcloud Mail before 2.2.2 allows attackers with database access to read user passwords during OAuth2 setup. AccountForm submitted IMAP and SMTP password fields for XOAUTH2 accounts, and SetupService persisted them instead of leaving them empty until an access token arrived. Database access during the incomplete setup window is required, and the reported consequence is disclosure of the stored mail-account password.
The record
- CVE
- CVE-2023-23944
- Published
- Feb 6, 2023
- Updated
- Mar 10, 2025
- Vendor
- Nextcloud GmbH
- Product
- Security Advisories
- Classifications
- CWE-312, CWE-256, T1555
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Feb 6, 2023CVE publishedPublication date reported by the CVE source.
- Mar 10, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 2.2.2
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
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Technologies
Your stack
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Your stack
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