The LinkedIn SC plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the 'linkedin_sc_date_format', 'linkedin_sc_api_key', and 'linkedin_sc_secret_key' parameters. This vulnerability exists in all versions up to, and including, 1.1.9 due to insufficient input sanitization and output escaping. Authenticated attackers with administrator-level access can inject arbitrary web scripts in pages that execute whenever a user accesses the injected page.
Severity for this vulnerability is classified as medium, with a CVSS score of 4.4. Although not the highest severity, it poses a risk to organizations as it allows for potential data exposure and manipulation. Organizations should prioritize addressing this vulnerability to mitigate risks.
Currently, no public exploit has been confirmed for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the risk remains due to the potential for exploitation by authenticated users with elevated privileges.
Organizations using the LinkedIn SC plugin should take immediate action to patch their installations. The urgency of patching is underscored by the vulnerability's ability to impact the integrity and confidentiality of user data.
Vulnerability Details
The vulnerability allows authenticated users with administrator-level access to exploit the LinkedIn SC plugin for WordPress, injecting arbitrary scripts through specific parameters. The CVSS 3.1 vector for this vulnerability is AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N, indicating a network attack vector with high complexity and high privileges required. The potential impact includes low confidentiality and integrity losses.
The CWE classification for this vulnerability is CWE-79, which refers to improper neutralization of input during web page generation ('Cross-site Scripting').
Technical Analysis
The root cause of this vulnerability stems from inadequate input sanitization and output escaping within the LinkedIn SC plugin. Attackers may leverage this weakness to inject scripts that execute in the context of an authenticated user's session.
The attack vector is primarily network-based, and the exploitation complexity is assessed as high due to the need for authenticated access. Privileges required are high, meaning an attacker must have administrator capabilities to exploit this vulnerability. User interaction is not required for the attack to succeed.
The vulnerability impacts confidentiality and integrity, allowing unauthorized script execution that could compromise user data and application integrity.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to user data and the ability to manipulate web pages viewed by users. Given that the vulnerability has a medium severity score, organizations are advised to address it in their priority patch cycle.
The blast radius for the vulnerability is significant, as it impacts all users of the LinkedIn SC plugin version 1.1.9 and prior. Organizations should evaluate their exposure and take appropriate action to mitigate risks.
Given the exploitation potential, organizations must prioritize the remediation of this vulnerability immediately to prevent possible exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch, specifically versions up to and including 1.1.9 of the LinkedIn SC plugin for WordPress are affected.
Mitigation & Remediation
Organizations should prioritize patching to the latest version of the LinkedIn SC plugin to remediate this vulnerability. If immediate patching is not possible, consider implementing input validation and output escaping for the affected parameters until an update can be applied. Regular code reviews and security testing can help prevent similar vulnerabilities in the future.
Organizations are encouraged to engage in regular continuous penetration testing to identify vulnerabilities such as this and strengthen their security posture.
Detection Guidance
To detect potential exploitation, organizations should monitor logs for unusual script executions and user interactions. Behavioral anomalies, particularly those involving administrative actions, should be investigated. Network signatures related to unauthorized script injections can also be beneficial in identifying attempted exploits.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-0812 highlights the ongoing need for secure coding practices in plugin development. This vulnerability represents a common failure in input validation that can lead to serious security issues if left unaddressed. Security teams should take this as a reminder to implement robust validation and sanitization processes in their development life cycles.
For further insights on vulnerability management, organizations can explore resources on vulnerability management programs. Additionally, understanding the penetration testing methodology can further enhance defensive strategies against such vulnerabilities.
Lastly, organizations should stay informed about trends in ransomware targeting to prepare for potential future threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)