Cyber Posture

CVE-2025-65602

Critical

Published: 10 December 2025

Published
10 December 2025
Modified
18 December 2025
KEV Added
—
Patch
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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0013 32.3th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Description

A template injection vulnerability in the /vip/v1/file/save component of ChanCMS v3.3.4 allows attackers to execute arbitrary code via a crafted POST request.

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match
prevent

Directly mandates timely remediation of the specific template injection flaw in ChanCMS v3.3.4 to prevent arbitrary code execution.

SI-10 Information Input Validation good match
prevent

Requires validation of POST request inputs to the /vip/v1/file/save endpoint to block crafted payloads causing template injection.

AC-14 Permitted Actions Without Identification or Authentication good match
prevent

Restricts or safeguards unauthenticated actions on the vulnerable /vip/v1/file/save endpoint to prevent exploitation by network-accessible attackers.

Security SummaryAI

CVE-2025-65602 is a template injection vulnerability in the /vip/v1/file/save component of ChanCMS version 3.3.4. Published on 2025-12-10, it enables attackers to execute arbitrary code through a crafted POST request. The issue carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and is linked to CWE-94 (code injection) and CWE-1336 (incorrect handling of code blocks in templates).

Any unauthenticated attacker with network access can exploit this vulnerability due to its low attack complexity and lack of requirements for privileges or user interaction. Exploitation via a specially crafted POST request to the affected endpoint results in remote code execution, providing high-impact access to compromise confidentiality, integrity, and availability of the targeted ChanCMS instance.

Advisories and further details are available in the ChanCMS repository at https://gitee.com/chancms/ChanCMS and the Notion page describing the unauthenticated RCE at https://www.notion.so/ChanCMS-Unauthenticated-RCE-2a3ee9235ba380fc9973e16c06258689.

Details

CWE(s)
CWE-94CWE-1336

Affected Products

chancms
chancms
3.3.4

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

The vulnerability is an unauthenticated template injection in a public-facing web application component (/vip/v1/file/save) enabling remote code execution via crafted POST request, directly mapping to exploitation of public-facing applications.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

References