CVE-2024-12601Network attack vector

Service degradation via unbounded CAPTCHA dimensions

Published Dec 17, 2024 · Updated Apr 8, 2026

Denial of service in CodePeople Calculated Fields Form 5.2.63 and earlier allows remote attackers to slow servers through CAPTCHA generation. The captcha/captcha.php endpoint accepts request-controlled width and height values without upper bounds and uses them to allocate CAPTCHA images. No authentication or user interaction is required; repeated oversized-image requests consume server resources and degrade availability without affecting data confidentiality or integrity.

CVSS severity5.3
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in CodePeople Calculated Fields Form 5.2.63 and earlier allows remote attackers to slow servers through CAPTCHA generation. The captcha/captcha.php endpoint accepts request-controlled width and height values without upper bounds and uses them to allocate CAPTCHA images. No authentication or user interaction is required; repeated oversized-image requests consume server resources and degrade availability without affecting data confidentiality or integrity.

The record

CVE
CVE-2024-12601
Published
Dec 17, 2024
Updated
Apr 8, 2026
Vendor
CodePeople
Product
Calculated Fields Form
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 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 <=5.2.63

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CodePeople · Calculated Fields Formversion=0 <=5.2.63

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

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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-400Uncontrolled Resource Consumption
T1499.003Endpoint Denial of Service: Application Exhaustion

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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