CVE-2026-8905

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 6.1
EPSS 0.0014
EPSS Percentile 3.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-352
Status published
Products (1)
osiris8/Osiris Signature Banner < 0.5
Published Jun 24, 2026
Tracked Since Jun 24, 2026