CVE-2026-0674 is a medium-severity missing authorization vulnerability in Campaign Monitor for WordPress. This vulnerability allows exploiting incorrectly configured access control security levels, which could potentially lead to unauthorized access to sensitive information. The issue affects Campaign Monitor for WordPress from an unspecified version through 2.9.1.
The CVSS score for this vulnerability is 4.3, indicating a medium severity level. This score reflects a network attack vector, low attack complexity, and low privileges required for exploitation. Organizations utilizing affected versions should prioritize patching immediately to mitigate potential risks.
Risk to organizations includes unauthorized access due to broken access controls, which could lead to data breaches or manipulation. Organizations should assess their exposure and implement necessary security measures.
The vulnerability was published on January 8, 2026, and remains in a deferred status. Currently, there is no known public exploit or proof of concept available for this vulnerability.
Vulnerability Details
The official description states that this vulnerability allows exploiting incorrectly configured access control security levels in Campaign Monitor for WordPress forms-for-campaign-monitor. The CWE classification for this vulnerability is CWE-862, which indicates a missing authorization issue.
The CVSS vector string for CVE-2026-0674 is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, highlighting its attack vector as NETWORK, attack complexity as LOW, and confidentiality impact as NONE, with a low integrity impact.
Affected versions include all versions of Campaign Monitor for WordPress up to 2.9.1. The publication and last modified dates are January 8, 2026, and April 23, 2026, respectively.
Technical Analysis
The root cause of this vulnerability lies in the improper configuration of access controls within the Campaign Monitor plugin for WordPress. This misconfiguration leads to a missing authorization check that can be exploited by attackers.
The attack vector is network-based, allowing attackers to exploit the vulnerability remotely without the need for physical access to the system. The complexity of the exploit is low, which means that an attacker does not require advanced skills to exploit this vulnerability.
Privileges required for exploitation are low, indicating that an attacker may not need to authenticate or possess significant permissions to carry out the attack. Additionally, user interaction is not required, making it easier for attackers to exploit this vulnerability.
The confidentiality impact is rated as NONE, meaning no sensitive data is at risk of exposure, while the integrity impact is rated as LOW, indicating that unauthorized modifications may occur. The availability impact is also rated as NONE.
Risk & Impact Analysis
Real-world deployment risk for organizations using the affected product is significant, as broken access controls can lead to unauthorized access to sensitive data. This vulnerability poses a risk of data breaches, which can have serious legal and reputational implications for organizations.
The urgency for organizations to address this vulnerability is high, given the potential for exploitation. Organizations should prioritize this vulnerability in their patching cycle to minimize the risk of compromise.
The blast radius potential is concerning, as attackers may exploit this vulnerability to gain access to multiple systems or services that rely on the Campaign Monitor for WordPress plugin, leading to a wider impact than initially anticipated.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Campaign Monitor for WordPress prior to the vendor patch are affected by this vulnerability. Specifically, the versions from n/a through 2.9.1 are susceptible.
Mitigation & Remediation
Organizations should prioritize updating to the latest version of Campaign Monitor for WordPress to mitigate this vulnerability. If immediate patching is not possible, consider implementing access control measures and auditing existing configurations to ensure proper authorization checks are in place.
For further guidance on securing your applications, organizations may refer to the application security assessment services.
Detection Guidance
To monitor for potential exploitation of this vulnerability, organizations should review logs for unusual access patterns, especially around the Campaign Monitor for WordPress plugin. Behavioral anomalies indicating unauthorized access attempts should be flagged and investigated.
AppSecure Threat Intelligence Insight
CVE-2026-0674 represents a critical reminder of the importance of properly configuring access controls in web applications. As vulnerabilities like this emerge, security teams must remain vigilant and proactive in their vulnerability management practices.
To enhance security posture, organizations should consider adopting a comprehensive penetration testing strategy to identify and remediate similar vulnerabilities before they can be exploited.
Additionally, ongoing training and awareness programs for development teams can significantly reduce the risk of configuration issues and vulnerabilities in the future.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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