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CVE-2021-47976— TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload

Quick assessment

Affected
Textpattern TextPattern CMS
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.

Textpattern CMS是Textpattern团队的一个基于Php的内容管理系统。 TextPattern CMS 4.9.0-dev版本存在跨站请求伪造漏洞，该漏洞源于存在远程代码执行漏洞，允许经过身份验证的攻击者利用插件上传功能上传任意PHP文件，攻击者可进行身份验证、从插件事件页面检索CSRF令牌，并上传恶意PHP文件到textpattern/tmp/目录执行代码。

CVSS 8.8 · High EPSS 0.32% · P24

Affected Version Matrix 1

VendorProduct Version RangeStatus
Textpattern TextPattern CMS 4.9.0-dev affected
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I. Basic Information for CVE-2021-47976

Vulnerability Information
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Vulnerability Title
TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload
Source: CVE Program / CVE List V5
Vulnerability Description
TextPattern CMS 4.9.0-dev contains a remote code execution vulnerability that allows authenticated attackers to upload arbitrary PHP files by exploiting the plugin upload functionality. Attackers can authenticate, retrieve a CSRF token from the plugin event page, and upload malicious PHP files to the textpattern/tmp/ directory for code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Textpattern CMS 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Textpattern CMS是Textpattern团队的一个基于Php的内容管理系统。 TextPattern CMS 4.9.0-dev版本存在跨站请求伪造漏洞，该漏洞源于存在远程代码执行漏洞，允许经过身份验证的攻击者利用插件上传功能上传任意PHP文件，攻击者可进行身份验证、从插件事件页面检索CSRF令牌，并上传恶意PHP文件到textpattern/tmp/目录执行代码。
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
Textpattern TextPattern CMS 4.9.0-dev -

II. Public POCs for CVE-2021-47976

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7219 chars
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III. Intelligence Information for CVE-2021-47976

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Vendor Advisories for CVE-2021-47976 (1)

Exploits & Public PoCs for CVE-2021-47976 (1)

IV. Related Vulnerabilities

Same product: TextPattern CMS
Same vendor: Textpattern
Same weakness: CWE-352

V. Comments for CVE-2021-47976

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