CVE-2022-2148 in LinkedIn Company Updates Plugin
Summary
by MITRE • 07/17/2022
The LinkedIn Company Updates WordPress plugin through 1.5.3 does not sanitise and escape its settings, allowing high privilege users such as admin to perform cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/01/2022
The vulnerability identified as CVE-2022-2148 affects the LinkedIn Company Updates WordPress plugin version 1.5.3 and earlier, presenting a critical cross-site scripting weakness that undermines the security posture of WordPress installations. This flaw resides in the plugin's handling of user settings where insufficient sanitization and escaping mechanisms allow malicious code injection. The vulnerability specifically targets high-privilege users such as administrators who possess the capability to modify plugin configurations, making it particularly dangerous as it bypasses standard WordPress security controls that typically restrict unfiltered HTML input.
The technical exploitation of this vulnerability occurs through the manipulation of plugin settings where user-supplied input is directly rendered without proper validation or escaping. When administrators access the plugin configuration interface, the unsanitized data is processed and displayed in a manner that allows malicious scripts to execute within the context of other users' browsers. This represents a classic XSS attack vector where the vulnerability is not dependent on the unfiltered_html capability being enabled, but rather stems from the plugin's failure to properly sanitize user inputs regardless of WordPress's security restrictions. The flaw falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities, and aligns with ATT&CK technique T1203 which involves exploitation of web application vulnerabilities for code execution.
The operational impact of CVE-2022-2148 extends beyond simple script injection as it provides attackers with the ability to execute arbitrary code in the browsers of authenticated users, potentially leading to session hijacking, data exfiltration, or further privilege escalation within the WordPress environment. Administrators who are tricked into viewing maliciously crafted plugin settings can unknowingly execute malicious scripts that persist in the browser until the session expires. This vulnerability is particularly concerning because it operates within the confines of legitimate administrative functionality, making detection more difficult as malicious activities appear to originate from trusted administrative sources. The attack surface is further expanded as compromised administrators could potentially use this vulnerability to establish persistent backdoors or to compromise additional systems within the network.
Mitigation strategies for CVE-2022-2148 should prioritize immediate plugin updates to versions that address the sanitization issues, as the vendor has likely released patches to resolve the vulnerability. Organizations should implement strict input validation and output escaping mechanisms for all plugin configurations, ensuring that any user-supplied data is properly sanitized before being stored or displayed. Security monitoring should be enhanced to detect unusual administrative activities or suspicious plugin configurations that might indicate exploitation attempts. Additionally, implementing web application firewalls and content security policies can provide additional layers of protection against XSS attacks, while regular security audits of installed plugins should be conducted to identify similar vulnerabilities in other third-party components. The vulnerability demonstrates the critical importance of proper input validation and output escaping in web applications, particularly in administrative interfaces where elevated privileges can amplify the impact of security flaws.