CVE-2026-45128 LOW

CVE-2026-45128: MyBB: ACP Users View Manager default CSRF

Vendor Mybb
Product mybb
Weakness CWE-352 · CSRF
Published August 18, 2026
Last update August 18, 2026
View on NVD All CVEs

CVSS base score

3.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

MyBB is free and open source forum software. Prior to 1.8.40, the ACP Users View Manager module does not validate requests correctly, allowing same-site attackers to change a victim administrator's default user list view by embedding a specially crafted URL. The Set as Default control named set_default in Admin CP, Users & Groups, Users, View Manager changes the administrator's default view on GET requests without request forgery protection. The uniquely identifying implementation details include Users & Groups → Users → View Manager, and admin/inc/functions_view_manager.php. This issue is fixed in version 1.8.40.

Key dates

02Disclosure timeline

August 18, 2026 CVE published

Related vulnerabilities

04Related CVE

CVE-2026-57785 WordPress ApusListing theme <= 1.2.63 - Cross Site Request Forgery (CSRF) vulnerability CVE-2026-65540 WordPress Popup for CF7 with Sweet Alert plugin <= 1.6.5 - Cross Site Request Forgery (CSRF) vulnerability CVE-2026-57766 WordPress WPIDE – File Manager & Code Editor plugin <= 3.5.6 - Cross Site Request Forgery (CSRF) vulnerability CVE-2026-15988 AI Engine <= 3.6.5 - Cross-Site Request Forgery to Privilege Escalation via REQUEST_URI Substring Match CVE-2026-63265 Joomla Extension - regularlabs.com - Inconsistent CSRF token checks / privilege checks in various Regular Labs extension AJAX endpoints