Password brute force via unthrottled change attempts
Published Jun 12, 2025 · Updated Jun 12, 2025
CWE-307 in the password-change endpoint in vantage6 before 4.11.0 allows remote authenticated users to brute-force the current password. The PATCH handler calls user.check_password directly, returning a distinct error for each wrong current_password without invoking the login-attempt counter and lockout path. A valid authenticated session is required; repeated guesses can recover the account password for reuse outside that session.
Summary
What happened
CWE-307 in the password-change endpoint in vantage6 before 4.11.0 allows remote authenticated users to brute-force the current password. The PATCH handler calls user.check_password directly, returning a distinct error for each wrong current_password without invoking the login-attempt counter and lockout path. A valid authenticated session is required; repeated guesses can recover the account password for reuse outside that session.
The record
- CVE
- CVE-2025-43863
- Published
- Jun 12, 2025
- Updated
- Jun 12, 2025
- Vendor
- vantage6
- Product
- vantage6
- Classifications
- CWE-307, T1110.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 12, 2025CVE publishedPublication date reported by the CVE source.
- Jun 12, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 4.11.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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