CVE-2026-86244: FastAdmin User Controller User.php login cross site scripting
A security vulnerability has been detected in FastAdmin up to 1.2.0.20210401beta. Affected is the function register/login of the file application/index/controller/User.php of the component User Controller. Such manipulation of the argument url leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. Upgrading to version 1.2.1.20210731beta is able to address this issue. The name of the patch is b3d32e2bf3637488cfe2fc58a27a9d2475b2b51b. It is recommended to upgrade the affected component.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
FastAdminto a version that resolves this vulnerability.Fixed in 1.2.1.20210731_betaPatch b3d32e2bf3637488cfe2fc58a27a9d2475b2b51b
Event History
Frequently Asked Questions
Which deployments are affected?
FastAdmin versions up to and including 1.2.0.20210401_beta are affected in the User Controller's register/login handling in application/index/controller/User.php. Version 1.2.1.20210731_beta addresses the issue.
What does an attacker need to exploit this issue?
The attack can be performed remotely without privileges, but it requires user interaction. An attacker manipulates the url argument associated with the register/login functionality to trigger cross-site scripting.
Is public exploit information available?
Yes. The exploit has been publicly disclosed and may be used.
What should be done if the installation is affected?
Upgrade the affected FastAdmin component to version 1.2.1.20210731_beta. The referenced patch is b3d32e2bf3637488cfe2fc58a27a9d2475b2b51b.