Threat intelligence

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

CVE-2026-8905 · osiris-signature-banner

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Osiris Signature Banner at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Osiris Signature Banner <= 0.5 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'prepend_text' Parameter
Affected software: osiris-signature-banner(Plugin)
Affected versions: ≤ 0.5
Authentication: Not specified in feed title — see source advisory
Vulnerability type: Cross-site scripting
CVE: CVE-2026-8905
Published: 23 June 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory 03226722-000c-4bfe-a09b-e75882274845). Methodology and redistribution notes

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