# Upload Malicious File in mojoPortal v2.7 (CVE-2022-40341)

**Vulnerability Type:** Upload Malicious File

**Vendor of Product:** mojoPortal

**Discoverer:** Dat Hoang and Duy Anh of VietSunshine Cyber Security Services

**Affected version:** mojoPortal - 2.7

**Attack Type:** Remote

**Description:** mojoPortal v2.7 was discovered to contain an arbitrary file upload vulnerability which allows attackers to execute arbitrary code via a crafted PNG file.

**Impact:** Remote code execution

**Attack vector**

An attacker requires an account. An attacker does the following steps:

> * **Step 1:** An authenticated attacker could access URL: https\://{IP]/Admin/FileManagerAlt.aspx to use the File Manager feature.
> * **Step 2:** Upload a png file containing malicious aspx code
> * **Step 3:** Rename the uploaded file extension from png to aspx
> * **Step 4:** Access URL https\://{IP]/Data/Sites/1/media/\[filename] to get the webshell

<figure><img src="/files/kOaBPUqFGQjhPqqTMyJY" alt=""><figcaption></figcaption></figure>


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