What is CVE-2026-8905?

CVE-2026-8905 is a medium-severity vulnerability in Osiris8 Osiris Signature Banner, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.1/10. Published 2026-06-24.

How severe is CVE-2026-8905?

Medium severity. CVSS v3 base score is 6.1 out of 10.

CSRF in Osiris8 Osiris Signature Banner

CVE-2026-8905

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 unauthen…

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.001 (3.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Osiris8 Osiris Signature Banner — versions 0

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

Frequently asked questions

What is CVE-2026-8905?: CVE-2026-8905 is a medium-severity vulnerability in Osiris8 Osiris Signature Banner, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.1/10. Published 2026-06-24.
How severe is CVE-2026-8905?: Medium severity. CVSS v3 base score is 6.1 out of 10.