Meta Tag Manager Vulnerability – Authenticated (Subscriber+) PHP Object Injection – CVE-2024-1770 |WordPress Plugin Vulnerability Report

Plugin Name: Meta Tag Manager

Key Information:

  • Software Type: Plugin
  • Software Slug: meta-tag-manager
  • Software Status: Active
  • Software Author: netweblogic
  • Software Downloads: 865,531
  • Active Installs: 100,000
  • Last Updated: March 27, 2024
  • Patched Versions: 3.1
  • Affected Versions: <= 3.0.2

Vulnerability Details:

  • Name: Meta Tag Manager <= 3.0.2
  • Title: Authenticated (Subscriber+) PHP Object Injection
  • Type: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE: CVE-2024-1770
  • CVSS Score: 8.8
  • Publicly Published: March 27, 2024
  • Researcher: Francesco Carlucci
  • Description: The Meta Tag Manager plugin for WordPress is susceptible to PHP Object Injection via the deserialization of untrusted inputs within the get_post_data function in versions up to and including 3.0.2. This vulnerability allows authenticated users with at least contributor-level access to inject PHP Objects. Although the plugin itself does not contain a usable Property Oriented Programming (POP) chain, the presence of another vulnerable plugin or theme on the site could escalate this vulnerability, potentially leading to arbitrary file deletion, sensitive data exposure, or code execution.


The Meta Tag Manager plugin for WordPress contains a critical vulnerability in all versions up to and including 3.0.2, which permits PHP Object Injection through the deserialization of untrusted inputs. This issue has been resolved in version 3.1.

Detailed Overview:

Discovered by security researcher Francesco Carlucci, this vulnerability poses a significant threat due to the high impact of potential PHP Object Injection attacks. Attackers could leverage this vulnerability in conjunction with other vulnerabilities to achieve remote code execution, data leakage, or even complete site compromise. The absence of a direct POP chain within Meta Tag Manager itself somewhat mitigates the risk; however, the interconnected nature of WordPress plugins and themes means that the presence of other vulnerable software on the same site could provide the necessary conditions for exploit. Following the public disclosure, the developers promptly addressed the vulnerability, releasing an updated version that no longer accepts untrusted input for deserialization.

Advice for Users:

  • Immediate Action: Users should immediately upgrade the Meta Tag Manager plugin to version 3.1 or later to mitigate the risk associated with this vulnerability.
  • Check for Signs of Vulnerability: Site administrators should review their user roles and access levels, ensuring only trusted users have the capability to modify Meta Tag Manager settings. Additionally, monitoring for unusual site behavior or unauthorized changes can help in early detection of exploitation attempts.
  • Alternate Plugins: Given the critical nature of this vulnerability, users may consider evaluating alternative SEO and meta tag management plugins, especially if the update cannot be applied immediately.
  • Stay Updated: It's crucial to keep all WordPress core software, themes, and plugins updated to their latest versions to protect against known vulnerabilities.


The rapid response by the Meta Tag Manager development team in patching this vulnerability highlights the critical role of ongoing software maintenance in web security. Users of the Meta Tag Manager plugin should ensure they have updated to version 3.1 or later to safeguard their WordPress sites from potential exploitation. The discovery of CVE-2024-1770 serves as a reminder of the ever-present need for vigilance in the digital domain, particularly for site administrators and small business owners who rely on WordPress for their online presence.


Detailed Report: 

In today's digital landscape, the security of your WordPress site is paramount. A stark illustration of this is the recent discovery of a critical vulnerability in the Meta Tag Manager plugin, a popular tool used by over 100,000 websites to manage SEO and meta tag information. Identified as CVE-2024-1770, this flaw opened the door to PHP Object Injection attacks, highlighting the ever-present need for vigilance and timely updates in safeguarding your digital presence.

Meta Tag Manager: A Vital Tool at Risk

The Meta Tag Manager plugin, developed by netweblogic, boasts over 865,531 downloads, underscoring its popularity and widespread use. However, its utility also made it a target. Versions up to and including 3.0.2 were found to be vulnerable, allowing attackers with as little as contributor-level access to execute potentially devastating PHP Object Injection attacks. This vulnerability was thoroughly addressed and patched in the subsequent release, version 3.1, on March 27, 2024.

Unpacking CVE-2024-1770

CVE-2024-1770 was brought to light by Francesco Carlucci, a security researcher who pinpointed the risk within the get_post_data function of the plugin. This function failed to adequately sanitize user-supplied inputs, creating a loophole for PHP Object Injection. While the plugin itself lacked a direct Property Oriented Programming (POP) chain, the exploitation risk escalated if other vulnerable plugins or themes were present, potentially enabling attackers to delete files, steal sensitive data, or execute unauthorized code.

Potential Impacts and Remediation Steps

The implications of CVE-2024-1770 are far-reaching. Beyond the immediate risk of website compromise, the vulnerability posed a threat to user privacy and data integrity, potentially eroding trust in affected websites. To mitigate these risks, users were urged to update to version 3.1 of the Meta Tag Manager promptly. This version eliminated the vulnerability by refusing untrusted input for deserialization. Site administrators were also advised to monitor their websites for unusual activities, restrict user permissions to the bare minimum necessary, and stay informed about security updates.

Historical Context and Proactive Security

This wasn't the first time Meta Tag Manager faced security scrutiny. With one previous vulnerability reported since July 18, 2023, the plugin's history reinforces the importance of ongoing security assessments and updates. For small business owners, who often juggle multiple responsibilities, understanding the history and potential vulnerabilities of the plugins they rely on can seem daunting.

The Importance of Diligence in Web Security

The discovery and swift resolution of CVE-2024-1770 serve as a critical reminder of the dynamic nature of web security. For small business owners, staying abreast of such vulnerabilities and updates might seem like a tall order amidst myriad other duties. However, the health of your online presence, the safeguarding of customer data, and the integrity of your digital infrastructure depend on this vigilance. Leveraging tools for automatic updates, subscribing to security advisories, and conducting regular site audits can streamline this process, ensuring that your WordPress site remains a secure and trustworthy platform for your business.

In conclusion, the CVE-2024-1770 vulnerability in the Meta Tag Manager plugin underscores a universal truth in the digital domain: security is an ongoing journey, not a one-time achievement. For small business owners, prioritizing this aspect of your website is not just about protecting your digital assets; it's about preserving the trust and confidence of your customers in an increasingly interconnected world.

Staying Secure

Staying on top of WordPress security can feel overwhelming for small business owners without dedicated IT staff. At Your WP Guy, we exist to shoulder that burden for you. Our WordPress experts can fully audit, secure, maintain and support your site - so you can focus on growing your business with peace of mind.

Don't tackle security risks alone. Let us help you assess any impact from this vulnerability, update your plugins, and implement ongoing maintenance to avoid future threats. We treat your website like it's our own - because we know how critical it is for reaching your customers.

Get in touch for a free consultation today on making WordPress security stress-free. Call 678-995-5169 or book a call here. Our knowledgeable team is ready to help you safeguard your online presence.

Meta Tag Manager Vulnerability – Authenticated (Subscriber+) PHP Object Injection – CVE-2024-1770 |WordPress Plugin Vulnerability Report FAQs

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