CVE-2025-65602Network attack vector

Unauthenticated code execution via template injection

Published Dec 10, 2025 · Updated Dec 10, 2025

Server-side template injection in ChanCMS 3.3.4 allows remote attackers to execute arbitrary code through a crafted POST request. The /vip/v1/file/save endpoint fails to neutralize executable template syntax in attacker-controlled POST content before template processing. No authentication or user interaction is required, and successful exploitation executes code in the server-side application context.

CVSS severity9.8
Critical
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in ChanCMS 3.3.4 allows remote attackers to execute arbitrary code through a crafted POST request. The /vip/v1/file/save endpoint fails to neutralize executable template syntax in attacker-controlled POST content before template processing. No authentication or user interaction is required, and successful exploitation executes code in the server-side application context.

The record

CVE
CVE-2025-65602
Published
Dec 10, 2025
Updated
Dec 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1336, CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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