CVE-2026-0812 is a stored cross-site scripting vulnerability in the LinkedIn SC WordPress plugin by guillaumev. It arises from insufficient sanitization and escaping of the 'linkedin_sc_date_format', 'linkedin_sc_api_key', and 'linkedin_sc_secret_key' parameters. This flaw allows authenticated users with high privileges (administrator or above) to inject arbitrary web scripts that execute in the context of users visiting the compromised pages. The vulnerability affects all versions up to and including 1.1.9. The CVSS 3.1 base score is 4.4, reflecting network attack vector, high attack complexity, high privileges required, no user interaction, and partial confidentiality and integrity impact.

An attacker with administrator-level access can exploit this vulnerability to inject malicious scripts into pages generated by the plugin. These scripts execute in the browsers of users who view the infected pages, potentially leading to theft of session tokens, defacement, or other client-side impacts. The vulnerability does not affect availability and requires high privileges, limiting the scope of exploitation.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict administrator access to trusted users only and consider disabling or removing the LinkedIn SC plugin if possible. Monitor for updates from the vendor or plugin author for a security patch addressing this issue.