CVE-2026-49765Public exploitNetwork attack vector

Code execution via unsafe form-value deserialization

Published Jun 15, 2026 · Updated Jun 15, 2026

PHP object injection in CRM Perks Integration for Mailchimp 1.1.8 and earlier allows remote attackers to inject objects through form data. In cf7-mailchimp.php, the form-field processing path passes non-array values to maybe_unserialize() without rejecting serialized objects. No authentication is required, but file deletion, data retrieval, or code execution requires a usable POP chain from another installed theme or plugin.

CVSS severity9.8
Critical
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in CRM Perks Integration for Mailchimp 1.1.8 and earlier allows remote attackers to inject objects through form data. In cf7-mailchimp.php, the form-field processing path passes non-array values to maybe_unserialize() without rejecting serialized objects. No authentication is required, but file deletion, data retrieval, or code execution requires a usable POP chain from another installed theme or plugin.

The record

CVE
CVE-2026-49765
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
CRM Perks
Product
Integration for Mailchimp and Contact Form 7, WPForms, Elementor, Ninja Forms
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 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=n/a <=1.1.8 changes=[{"at":"1.1.9","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CRM Perks · Integration for Mailchimp and Contact Form 7, WPForms, Elementor, Ninja Formsversion=n/a <=1.1.8 changes=[{"at":"1.1.9","status":"unaffected"}]

Published CVSS scores

9.8PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
T1190Exploit Public-Facing Application

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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