Executive Summary

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the aThemeArt Theme Helper plugin for WordPress, impacting versions from n/a through 1.0.8. This vulnerability, tracked as CVE-2026-111413, has a CVSS score of 8.8, indicating high severity. The vulnerability allows an attacker to trick authenticated users into performing unintended actions on the WordPress site.

Technical Analysis

The CVE-2026-111413 vulnerability is classified as a Cross-Site Request Forgery (CSRF) issue. The vulnerability exists in the aThemeArt Theme Helper plugin, specifically affecting versions up to and including 1.0.8. The attack vector involves an unauthenticated attacker who tricks a logged-in user into performing an unintended action on the WordPress site. The root cause of this vulnerability is the lack of proper CSRF protection mechanisms in the plugin.

How It Gets Exploited

An attacker can exploit this vulnerability through a series of steps:
1. The attacker prepares a malicious request that performs an unwanted action on the WordPress site (e.g., changing settings, creating an admin account).
2. The attacker embeds this malicious request into a URL or HTML form that, when visited or submitted, will execute the unwanted action.
3. The attacker tricks a logged-in user with sufficient privileges into clicking on the malicious link or submitting the form.
4. Once the user interacts with the malicious link or form, the browser sends a request to the WordPress site, which includes the user's authentication cookies.
5. The WordPress site processes the request as if it came directly from the authenticated user, resulting in the execution of the unwanted action.
This type of attack requires user interaction and can lead to high impact, including confidentiality, integrity, and availability issues.

Impact Assessment

The CVE-2026-111413 vulnerability affects the aThemeArt Theme Helper plugin versions up to 1.0.8. Users of this plugin are at risk of CSRF attacks, which can lead to unauthorized actions on their WordPress sites. The CVSS score of 8.8 indicates a high severity level, with metrics showing:
- Attack Vector: Network (AV:N)
- Attack Complexity: Low (AC:L)
- Privileges Required: None (PR:N)
- User Interaction: Required (UI:R)
- Scope: Unchanged (S:U)
- Confidentiality Impact: High (C:H)
- Integrity Impact: High (I:H)
- Availability Impact: High (A:H)

Recommended Actions

To mitigate this vulnerability, the following actions are recommended:
- **Update the aThemeArt Theme Helper plugin to version 1.0.9 or later**. This will ensure that the CSRF protection mechanisms are properly implemented.
- **Verify that all user accounts on the WordPress site have the principle of least privilege**. Ensure that users only have the privileges necessary for their roles.
- **Implement additional security measures**, such as monitoring for suspicious requests and enforcing strong user authentication mechanisms.
- **Educate users about the risks of CSRF attacks** and the importance of being cautious with links and forms from untrusted sources.

Sources