Is CVE-2026-8905 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-8905?

CVE-2026-8905 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-8905

Description

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.