WuzhiCMS 5.0.0 Thumbnail Upload index.php unrestricted upload

Summaryinfo

A vulnerability classified as critical has been found in WuzhiCMS 5.0.0. The impacted element is an unknown function of the file index.php of the component Thumbnail Upload. The manipulation leads to unrestricted upload. This vulnerability is documented as CVE-2026-88419. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in WuzhiCMS 5.0.0. This issue affects some unknown processing of the file index.php of the component Thumbnail Upload. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An unrestricted upload of files with a dangerous type in the thumbnail-upload endpoint (/index.php?m=member&f=article&v=thumbUpload) of WuzhiCMS 5.0.0 allows an authenticated low-privileged member to upload a crafted .php file and execute arbitrary PHP code on the server, because the stored file extension is taken verbatim from the client-supplied filename with no extension allowlist or content validation and the file is written to the web-accessible uploadfile/ directory, from which the web server executes PHP.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-88419 since 09/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/22/2026). MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

By approaching the search of inurl:index.php it is possible to find vulnerable targets with Google Hacking.

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

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Content Management System

Name

• WuzhiCMS

Version

• 5.0.0

CPE 2.3info

• 🔒

CPE 2.2info

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