CVE-2024-4787Network attack vector

Arbitrary email sending via unrestricted AJAX parameters

Published Jun 19, 2024 · Updated Apr 8, 2026

Improper input validation in Cost Calculator Builder Pro 3.1.75 and earlier allows remote attackers to send arbitrary email via AJAX. The send_pdf and send_pdf_front functions accept attacker-controlled recipient and message content without sufficient restrictions before dispatching mail. Neither WordPress authentication nor user interaction is required, allowing abuse of the site's mail capability to deliver attacker-chosen messages to any recipient.

CVSS severity5.8
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Cost Calculator Builder Pro 3.1.75 and earlier allows remote attackers to send arbitrary email via AJAX. The send_pdf and send_pdf_front functions accept attacker-controlled recipient and message content without sufficient restrictions before dispatching mail. Neither WordPress authentication nor user interaction is required, allowing abuse of the site's mail capability to deliver attacker-chosen messages to any recipient.

The record

CVE
CVE-2024-4787
Published
Jun 19, 2024
Updated
Apr 8, 2026
Vendor
StylemixThemes
Product
Cost Calculator Builder Pro
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 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 <=3.1.75

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

StylemixThemes · Cost Calculator Builder Proversion=0 <=3.1.75

Published CVSS scores

5.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

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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