CVE-2022-1918 in ToolBar to Share Plugin
Summary
by MITRE • 06/13/2022
The ToolBar to Share plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.0. This is due to missing nonce validation on the plugin_toolbar_comparte page. This makes it possible for unauthenticated attackers to update the plugins settings and inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 04/08/2026
The ToolBar to Share plugin for WordPress represents a widely used tool that enables website administrators to add social sharing buttons to their sites. This particular plugin version 2.0 and earlier contains a critical cross-site request forgery vulnerability that compromises the security of WordPress installations. The vulnerability stems from insufficient validation mechanisms within the plugin's administrative interface, specifically on the plugin_toolbar_comparte page where configuration settings can be modified. This flaw allows malicious actors to manipulate the plugin's functionality without proper authorization, potentially leading to severe consequences for website integrity and user safety.
The technical flaw manifests as a missing nonce validation mechanism that should be implemented to verify the authenticity of administrative requests. Nonce validation serves as a cryptographic token that ensures requests originate from legitimate administrative sessions and prevents unauthorized modifications to plugin settings. Without this protection, attackers can construct malicious requests that appear to come from legitimate administrative users, exploiting the trust relationship between the web application and its users. This vulnerability falls under the category of CWE-352, which specifically addresses Cross-Site Request Forgery issues in web applications. The absence of proper input validation and request verification creates an exploitable condition that directly violates fundamental security principles for web application development.
The operational impact of this vulnerability extends beyond simple configuration modification, as it enables attackers to inject malicious web scripts into the plugin's settings. When an administrator unknowingly clicks on a malicious link or visits a compromised website, the forged request can execute with the administrator's privileges, potentially allowing attackers to modify plugin configurations, inject malicious code, or redirect users to phishing sites. This creates a significant risk for website owners since administrators typically have elevated privileges and may be tricked into performing actions that compromise their site's security. The vulnerability is particularly dangerous because it requires minimal user interaction and can be exploited through social engineering techniques, making it a preferred target for attackers seeking persistent access to WordPress installations. The attack vector aligns with ATT&CK technique T1566.001, which involves phishing attacks that manipulate users into executing malicious actions.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected plugin to version 2.1 or later, where nonce validation has been properly implemented. Website administrators must ensure all WordPress plugins remain updated to protect against known vulnerabilities, implementing automated update mechanisms where possible. Security monitoring should include regular checks for unauthorized modifications to plugin configurations and suspicious administrative activities. Additionally, implementing proper web application firewall rules that can detect and block CSRF attempts, along with educating administrators about the risks of clicking untrusted links, forms the foundation for comprehensive defense against such attacks. The remediation process should also include reviewing all plugin configurations and ensuring that only authorized users have access to administrative functions, as outlined in security best practices for WordPress security management and access control.