CVE-2026-8905CWE-352

Osiris Signature Banner <= 0.5 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'prepend_text' Parameter

Medium · published June 24, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
6.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00177 · 6.9th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-06-24T05:33Z
EPSS history
Timeline
  • 24 JUN 05:33Z
    Osiris Signature Banner <= 0.5 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'prepend_text' Parameter
    cvelistv5