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CVE-2026-86244— FastAdmin User Controller User.php login cross site scripting

Quick assessment

Affected
n/a FastAdmin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FastAdmin是FastAdmin组织的一个基于ThinkPHP和Bootstrap构建的后台开发框架。 FastAdmin 1.2.0.20210401_beta及之前版本存在安全漏洞，该漏洞源于User Controller组件中application/index/controller/User.php文件内的register/login函数对url参数操作不当，容易受到跨站脚本攻击。

CVSS 4.3 · Medium EPSS 0.47% · P40

Affected Version Matrix 2

VendorProduct Version RangeStatus
n/a FastAdmin 1.2.0.20210401_beta affected
1.2.1.20210731_beta unaffected
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I. Basic Information for CVE-2026-86244

Vulnerability Information
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Vulnerability Title
FastAdmin User Controller User.php login cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in FastAdmin up to 1.2.0.20210401_beta. 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 1.2.1.20210731_beta is able to address this issue. The name of the patch is b3d32e2bf3637488cfe2fc58a27a9d2475b2b51b. It is recommended to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
FastAdmin 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastAdmin是FastAdmin组织的一个基于ThinkPHP和Bootstrap构建的后台开发框架。 FastAdmin 1.2.0.20210401_beta及之前版本存在安全漏洞，该漏洞源于User Controller组件中application/index/controller/User.php文件内的register/login函数对url参数操作不当，容易受到跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- FastAdmin 1.2.0.20210401_beta cpe:2.3:a:fastadmin:fastadmin:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-86244

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III. Intelligence Information for CVE-2026-86244

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Patches & Fixes for CVE-2026-86244 (1)

Vendor Advisories for CVE-2026-86244 (1)

Security Blog Posts for CVE-2026-86244 (1)

Other References for CVE-2026-86244 (2)

Same Patch Batch · n/a · 2026-09-07 · 4 CVEs total

CVE-2026-86271 4.7 MEDIUM FluentCMS PermissionManager.cs GetAccessible authorization
CVE-2026-86289 4.3 MEDIUM Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow
CVE-2026-86285 4.3 MEDIUM BookStack Attachment Edit Endpoint AttachmentController.php getUpdateForm access control

IV. Related Vulnerabilities

Same product: FastAdmin
Same vendor: n/a
Same weakness: CWE-79

V. Comments for CVE-2026-86244

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