CVE-2026-49763 CRITICAL

CVE-2026-49763: WordPress Integration for Contact Form 7 HubSpot plugin <= 1.3.7 - PHP Object Injection vulnerability

Vendor Crm Perks

Product Integration for Contact Form 7 HubSpot

Weakness CWE-502 · Unsafe deserialization

Published June 15, 2026

Last update June 15, 2026

View on NVD All CVEs

CVSS base score

9.8/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity High

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated PHP Object Injection in Integration for Contact Form 7 HubSpot <= 1.3.7 versions.

Explanation of Vulnerability in Simple Terms

02Summary

The Integration for Contact Form 7 HubSpot plugin contains a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the site. The plugin unsafely deserializes untrusted data without validation, enabling remote code execution. All versions up to 1.3.7 are affected. Site administrators should update immediately to a patched version.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site without authentication.

Potential impact on your site

04Site Impact

Complete site compromise: attackers can steal data, modify content, create admin accounts, or take the site offline.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-49763 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

Related vulnerabilities

Identifiers

CVE CVE-2026-49763

CWE CWE-502

CVSS 9.8 / CRITICAL

Affected versions