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CVE-2026-4509— PbootCMS File Upload file.php incomplete blacklist

Quick assessment

Affected
n/a PbootCMS
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.

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及之前版本存在安全漏洞，该漏洞源于File Upload组件文件core/function/file.php中未知函数对参数black的错误操作导致黑名单不完整，可能导致远程执行任意代码。

CVSS 6.3 · Medium EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4509

Vulnerability Information
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Vulnerability Title
PbootCMS File Upload file.php incomplete blacklist
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in PbootCMS up to 3.2.12. This affects an unknown function of the file core/function/file.php of the component File Upload. The manipulation of the argument black results in incomplete blacklist. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
PbootCMS 安全漏洞
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及之前版本存在安全漏洞，该漏洞源于File Upload组件文件core/function/file.php中未知函数对参数black的错误操作导致黑名单不完整，可能导致远程执行任意代码。
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-2026-4509

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III. Intelligence Information for CVE-2026-4509

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Vendor Advisories for CVE-2026-4509 (2)

News Coverage for CVE-2026-4509 (1)

Same Patch Batch · n/a · 2026-03-21 · 3 CVEs total

CVE-2026-4514 6.3 MEDIUM PbootCMS Backend UserController.php access control
CVE-2026-4510 4.3 MEDIUM PbootCMS Parameter MemberController.php alert_location cross site scripting

IV. Related Vulnerabilities

Same product: PbootCMS
Same vendor: n/a
Same weakness: CWE-184

V. Comments for CVE-2026-4509

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