CVE-2026-8905

The CVE concerns the Osiris Signature Banner WordPress plugin (versions up to and including 0.5). The root cause is missing or incorrect nonce validation on a function, enabling Cross-Site Request Forgery (CSRF). This could allow unauthenticated attackers to update plugin settings and inject mali...

CVE-2026-8905 Osiris Signature Banner <= 0.5 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'prepend_text' Parameter

The Osiris Signature Banner plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 0.5. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to update settings and inject malicious...