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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.
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NReferences
- https://plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.php#L107
- https://plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.php#L118
- https://plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.php#L139
- https://plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.php#L189
- https://www.wordfence.com/threat-intel/vulnerabilities/id/03226722-000c-4bfe-a09b-e75882274845?source=cve