Threat intelligence

HashBar – Announcement, Notification Bar & Popup Campaign <= 2.0.0 - Cross-Site Request Forgery

CVE-2026-66602 · hashbar-wp-notification-bar

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

Vulnerability: HashBar – Announcement, Notification Bar & Popup Campaign <= 2.0.0 - Cross-Site Request Forgery
Affected software: hashbar-wp-notification-bar(Plugin)
Affected versions: ≤ 2.0.0
Authentication: Not specified in feed title — see source advisory
Vulnerability type: CSRF
CVE: CVE-2026-66602
Published: 18 August 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May trick authenticated users into performing unintended actions.
Source: Data imported from Wordfence Intelligence (advisory 88b4791e-8c48-446e-b713-8958d60f668f). Methodology and redistribution notes

Check whether your installed version is affected

SiteRespond Defence matches your installed Hashbar Wp Notification Bar version against this catalog when the Defence plugin is connected to your WordPress site.

Start SiteRespond Defence for WordPress — £29.99/monthScan your website

All Hashbar Wp Notification Bar advisoriesBack to catalog