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CVE-2026-71294— Cotonti CMS Comments Plugin PHP Object Injection via Unrestricted unserialize() in Create/Edit Actions

Quick assessment

Affected
Cotonti Cotonti
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.

Cotonti是Cotonti组织的一个内容管理系统 Cotonti存在反序列化注入漏洞，该漏洞源于Comments插件反序列化用户提供的数据时未限制可实例化的类，可能导致PHP对象注入，进而可能造成远程代码执行等影响。

CVSS 7.7 · High EPSS 0.38% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cotonti Cotonti ≤ * affected
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I. Basic Information for CVE-2026-71294

Vulnerability Information
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Vulnerability Title
Cotonti CMS Comments Plugin PHP Object Injection via Unrestricted unserialize() in Create/Edit Actions
Source: CVE Program / CVE List V5
Vulnerability Description
Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via (trim-only sanitization) is passed to with no restriction, reachable by any member with write access to comments (the default setting in plugins/comments/comments.setup.php).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Cotonti 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cotonti是Cotonti组织的一个内容管理系统 Cotonti存在反序列化注入漏洞，该漏洞源于Comments插件反序列化用户提供的数据时未限制可实例化的类，可能导致PHP对象注入，进而可能造成远程代码执行等影响。
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
Cotonti Cotonti 0 ~ * -

II. Public POCs for CVE-2026-71294

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 10932 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-71294

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Patches & Fixes for CVE-2026-71294 (1)

Vendor Pages for CVE-2026-71294 (1)

IV. Related Vulnerabilities

Same product: Cotonti
Same vendor: Cotonti
Same weakness: CWE-502

V. Comments for CVE-2026-71294

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