CVE-2024-24770 | Username timing attack on recover password/MFA token in vantage6

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. Much like GHSA-45gq-q4xh-cp53, it is possible to find which usernames exist in vantage6 by calling the API routes `/recover/lost` and `/2fa/lost`. These routes send emails to users if they have lost their password or MFA token. This issue has been addressed in commit `aecfd6d0e` and is expected to ship in subsequent releases. Users are advised to upgrade as soon as a new release is available. There are no known workarounds for this vulnerability.

Published: 2024-03-14 Last update: 2025-07-30 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2024-24770 is rated Low Risk (32.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.39%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-24770

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.20% 0.39% +0.20%
2 2025-08-03 0.14% 0.20% +0.06%
3 2025-04-15 0.14%

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-24770

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
3.9 1.4 [email protected]

Weakness enumeration for CVE-2024-24770

GitHub Security Advisory for CVE-2024-24770

GHSA-5h3x-6gwf-73jm · Severity: medium · Ecosystem: pip — vantage6 vulnerable to a username timing attack on recover password/MFA token

Affected software / configurations for CVE-2024-24770

Vendor Product Version Raw CPE
vantage6 vantage6 <= 4.2.2 cpe:2.3:a:vantage6:vantage6:*:*:*:*:*:*:*:*

References for CVE-2024-24770

cvelogic Threat Intelligence