CVE-2026-8905
No known patch is available for this vulnerability.
The affected plugin has been removed from the WordPress.org directory, and no patched version is being distributed through the official directory. If you have the affected software installed, you should uninstall or replace it rather than wait for an update.
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <=0.5
Patches
Vulnerability mechanics
References
5- plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.phpnvd
- plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.phpnvd
- plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.phpnvd
- plugins.trac.wordpress.org/browser/osiris-signature-banner/tags/0.5/osiris-signature-banner.phpnvd
- www.wordfence.com/threat-intel/vulnerabilities/id/03226722-000c-4bfe-a09b-e75882274845nvd
News mentions
1- Wordfence Intelligence Weekly WordPress Vulnerability Report (June 22, 2026 to June 28, 2026)Wordfence Blog · Jul 2, 2026