CVE-2024-12034Network attack vector

Brute-force continuation via predictable IP-unblock key

Published Dec 24, 2024 · Updated Apr 8, 2026

Security-control bypass in Advanced Google reCAPTCHA 1.25 and earlier allows remote attackers to unblock a locked IP address. The recovery-link generator creates its request key without sufficient randomness, making the IP-unblock URL predictable. The source IP must first be locked after excessive failed logins; bypassing that lockout permits continued password guessing but does not itself grant account access.

CVSS severity5.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Security-control bypass in Advanced Google reCAPTCHA 1.25 and earlier allows remote attackers to unblock a locked IP address. The recovery-link generator creates its request key without sufficient randomness, making the IP-unblock URL predictable. The source IP must first be locked after excessive failed logins; bypassing that lockout permits continued password guessing but does not itself grant account access.

The record

CVE
CVE-2024-12034
Published
Dec 24, 2024
Updated
Apr 8, 2026
Vendor
WebFactory Ltd
Product
Advanced Google reCAPTCHA
Classifications
CWE-340, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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 <=1.25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WebFactory Ltd · Advanced Google reCAPTCHAversion=0 <=1.25

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-340Generation of Predictable Numbers or Identifiers
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

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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