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CVE-2026-4508— PbootCMS Member Login MemberController.php checkUsername sql injection

Quick assessment

Affected
n/a PbootCMS
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PbootCMS是PbootCMS开源的一款使用PHP语言开发的开源企业建站内容管理系统（CMS）。 PbootCMS 3.2.12及之前版本存在SQL注入漏洞，该漏洞源于Member Login组件文件apps/home/controller/MemberController.php中函数checkUsername对参数Username的错误操作，可能导致sql注入。

CVSS 7.3 · High EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4508

Vulnerability Information
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Vulnerability Title
PbootCMS Member Login MemberController.php checkUsername sql injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in PbootCMS up to 3.2.12. The impacted element is the function checkUsername of the file apps/home/controller/MemberController.php of the component Member Login. The manipulation of the argument Username leads to sql injection. The attack may be initiated remotely. The exploit is publicly available and might be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
PbootCMS SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PbootCMS是PbootCMS开源的一款使用PHP语言开发的开源企业建站内容管理系统（CMS）。 PbootCMS 3.2.12及之前版本存在SQL注入漏洞，该漏洞源于Member Login组件文件apps/home/controller/MemberController.php中函数checkUsername对参数Username的错误操作，可能导致sql注入。
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
- PbootCMS 3.2.0 cpe:2.3:a:pbootcms:pbootcms:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4508

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9249 chars
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III. Intelligence Information for CVE-2026-4508

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Vendor Advisories for CVE-2026-4508 (2)

Other References for CVE-2026-4508 (1)

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IV. Related Vulnerabilities

Same product: PbootCMS
Same vendor: n/a
Same weakness: CWE-89

V. Comments for CVE-2026-4508

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