CVE-2026-8905
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductOsiris Signature Banner
PublishedJun 24, 2026
First seenJun 24, 2026
Weakness typeCWE-352Cross-site request forgery (CSRF)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| osiris8 Osiris Signature Banner | v ≤ 0.5 | — |
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