CVE-2024-42164Public exploitNetwork attack vector

MFA removal via predictable password-reset tokens

Published Aug 12, 2024 · Updated Aug 12, 2024

Weak token generation in FIWARE Keyrock 8.4 and earlier allows remote authenticated users to disable another user's MFA via a predicted key. The disable_2fa_key generator uses a predictable password-reset token algorithm, allowing future keys to be derived after multiple reset tokens are issued. Any registered non-admin account can collect those tokens and submit a predicted disable_2fa link for an arbitrary user, removing MFA without that user's session.

CVSS severity4.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak token generation in FIWARE Keyrock 8.4 and earlier allows remote authenticated users to disable another user's MFA via a predicted key. The disable_2fa_key generator uses a predictable password-reset token algorithm, allowing future keys to be derived after multiple reset tokens are issued. Any registered non-admin account can collect those tokens and submit a predicted disable_2fa link for an arbitrary user, removing MFA without that user's session.

The record

CVE
CVE-2024-42164
Published
Aug 12, 2024
Updated
Aug 12, 2024
Vendor
FIWARE
Product
Keyrock
Classifications
CWE-287, CWE-330, T1556.006
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2024Record 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.

  1. Affected versionversion=0 <=8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FIWARE · Keyrockversion=0 <=8.4

Published CVSS scores

4.3CyberDanubeCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-330Use of Insufficiently Random Values
T1556.006Modify Authentication Process: Multi-Factor Authentication

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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