CVE-2026-8905
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
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.
Risk Assessment
Unauthenticated attackers can update settings and inject malicious web scripts via a forged request if they can trick a site administrator into performing an action.
Recommendation
It is recommended to update the plugin to the latest version and implement appropriate CSRF protection mechanisms.
Original NVD description (English source)
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 web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.