CVE-2021-32649— Authenticated file write leads to remote code execution in october/system
Quick assessment
Affected
octobercms october
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.
October CMS是一套基于PHP和Laravel Web应用程序框架的开源内容管理系统（CMS）。 October CMS存在代码注入漏洞，该漏洞源于该管理系统存在“创建、修改和删除网站页面”特权，攻击者可利用该漏洞上传特定的代码来执行PHP代码。
Possible ATT&CK Techniques 1 AI
T1505.003 · Web Shell
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I. Basic Information for CVE-2021-32649
Vulnerability Information
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Vulnerability Title
Authenticated file write leads to remote code execution in october/system
Source: CVE Program / CVE List V5
Vulnerability Description
October CMS is a self-hosted content management system (CMS) platform based on the Laravel PHP Framework. Prior to versions 1.0.473 and 1.1.6, an attacker with "create, modify and delete website pages" privileges in the backend is able to execute PHP code by running specially crafted Twig code in the template markup. The issue has been patched in Build 473 (v1.0.473) and v1.1.6. Those unable to upgrade may apply the patch to their installation manually as a workaround.
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
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
October CMS 代码代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
October CMS是一套基于PHP和Laravel Web应用程序框架的开源内容管理系统（CMS）。 October CMS存在代码注入漏洞，该漏洞源于该管理系统存在“创建、修改和删除网站页面”特权，攻击者可利用该漏洞上传特定的代码来执行PHP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 |
|---|---|---|---|---|
| octobercms | october | < 1.0.473 | - |
|
II. Public POCs for CVE-2021-32649
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2021-32649 (1)
Vendor Advisories for CVE-2021-32649 (1)
-
https://github.com/octobercms/october/security/advisories/GHSA-wv23-pfj7-2mjj x_refsource_CONFIRM
IV. Related Vulnerabilities
Same product: october
-
CVE-2026-49400
October CMS: PHP Object Injection via Backend Widget Session -
CVE-2026-29179
October: Editor Sub-Permission Bypass for Asset and Blueprin -
CVE-2026-27937
October: Reflected XSS via DataTable Form Widget -
CVE-2026-26274
October: Safe Mode Bypass via Twig Database Write Operations -
CVE-2026-26067
October: Safe Mode Bypass via CSS Preprocessor Compilers
Same vendor: octobercms
-
CVE-2026-49400
October CMS: PHP Object Injection via Backend Widget Session -
CVE-2026-46696
October CMS: Safe Mode Sandbox Bypass via Session Store and -
CVE-2026-29179
October: Editor Sub-Permission Bypass for Asset and Blueprin -
CVE-2026-27937
October: Reflected XSS via DataTable Form Widget -
CVE-2026-26274
October: Safe Mode Bypass via Twig Database Write Operations
Same weakness: CWE-74
-
CVE-2026-102291
Kirki – Freeform Page Builder, Website Builder & Customizer -
CVE-2026-76472
Cisco Meraki Security Hardening Release October 2026 - Impro -
CVE-2026-102156
Security Advisory 0191 -
CVE-2026-102158
Security Advisory 0190 -
CVE-2026-105800
i18next-http-backend incomplete URL validation permits SSRF
V. Comments for CVE-2021-32649
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