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CVE-2025-9824 – Apache Impact: Timing Safe Form Login Authenticator Enumeration Vulnerability

The following table lists the changes that have been made to the
CVE-2025-9824 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Sep. 03, 2025

    Action Type Old Value New Value
    Added Description ImpactThe attacker can validate if a user exists by checking the time login returns. This timing difference can be used to enumerate valid usernames, after which an attacker could attempt brute force attacks.

    PatchesThis vulnerability has been patched, implementing a timing-safe form login authenticator that ensures consistent response times regardless of whether a user exists or not.

    Technical DetailsThe vulnerability was caused by different response times when:

    * A valid username was provided (password hashing occurred)
    * An invalid username was provided (no password hashing occurred)

    The fix introduces a TimingSafeFormLoginAuthenticator that performs a dummy password hash verification even for non-existent users, ensuring consistent timing.

    WorkaroundsNo workarounds are available. Users should upgrade to the patched version.

    References * https://owasp.org/www-project-web-security-testing-guide/latest/4-Web_Application_Security_Testing/03-Identity_Management_Testing/04-Testing_for_Account_Enumeration_and_Guessable_User_Account
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-204
    Added Reference https://github.com/mautic/mautic/security/advisories/GHSA-3ggv-qwcp-j6xg
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