liweiyi ChestnutCMS up to 1.5.8 Template Creation code injection

Summaryinfo

A vulnerability classified as critical has been found in liweiyi ChestnutCMS up to 1.5.8. The affected element is an unknown function of the component Template Creation. This manipulation causes Remote Privilege Escalation. This vulnerability is handled as CVE-2025-70073. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in liweiyi ChestnutCMS up to 1.5.8. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component Template Creation. The manipulation with an unknown input leads to a remote privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue in ChestnutCMS v.1.5.8 and before allows a remote attacker to execute arbitrary code via the template creation function

The advisory is shared at github.com. This vulnerability is known as CVE-2025-70073 since 01/09/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/10/2026). MITRE ATT&CK project uses the attack technique T1059 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• liweiyi

Name

• ChestnutCMS

Version

• 1.5.0
• 1.5.1
• 1.5.2
• 1.5.3
• 1.5.4
• 1.5.5
• 1.5.6
• 1.5.7
• 1.5.8

Website

• Product: https://github.com/liweiyi/ChestnutCMS/

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Entryinfo

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