CVE-2023-44760 PoC — PortlandLabs Concrete CMS 跨站脚本漏洞

Source

https://github.com/sromanhu/CVE-2023-44760_ConcreteCMS-Stored-XSS---TrackingCodes

Associated Vulnerability

Title:PortlandLabs Concrete CMS 跨站脚本漏洞 (CVE-2023-44760)
Description:Multiple Cross Site Scripting (XSS) vulnerabilities in Concrete CMS v.9.2.1 allow an attacker to execute arbitrary code via a crafted script to the Header and Footer Tracking Codes of the SEO & Statistics. NOTE: the vendor disputes this because these header/footer changes can only be made by an admin, and allowing an admin to place JavaScript there is an intentional customization feature. Also, the exploitation method claimed by "sromanhu" does not provide any access to a Concrete CMS session, because the Concrete CMS session cookie is configured as HttpOnly.

Description

Multiple Cross Site Scripting vulnerability in ConcreteCMS v.9.2.1 allows a local attacker to execute arbitrary code via a crafted script to the Header and Footer Tracking Codes of the SEO & Statistics

Readme

# ConcreteCMS Stored XSS v.9.2.1

## Author: (Sergio)

**Description:** Multiple Cross Site Scripting vulnerability in ConcreteCMS v.9.2.1 allows a local attacker to execute arbitrary code via a crafted script to the Header and Footer Tracking Codes of the SEO & Statistics.

**Attack Vectors:** Scripting A vulnerability in the sanitization of the entry in the Header and Footer Tracking Codes of "SEO & Statistics" allows injecting JavaScript code that will be executed when the user accesses the web page.

---

### POC:


When logging into the panel, we will go to the "SEO & Statistics- Header and Footer Tracking Codes." section off Dashboard Menu.

![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/6b7c8a46-9654-41a2-9bae-3f6fbc0d88bf)



### XSS Payload:

```js
<img src=x:alert(alt) onerror=eval(src) alt='XSS Header'>
```


```js
<img src=x:alert(alt) onerror=eval(src) alt='XSS Footer'>
```



In the following image you can see the embedded code that executes the payload in the main web.
![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/863d688b-070d-45fd-af4a-5d6c2d8eeb61)


![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/b62dbf4b-0bed-4457-b0de-d10eb215451a)



We can use a payload to steal cookies and obtain them when a user logs on to the website in the two vulnerable fields.

![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/c48195a2-8eb8-4c38-b1bb-1097ac8f1fd3)


![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/9faf9541-1dd9-4490-abba-808e702a643f)


Original session cookie.

![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/12dce455-d11a-47b9-8cdf-6c18d507c40f)



Request captured with the external server:

![image](https://github.com/sromanhu/ConcreteCMS-Stored-XSS---TrackingCodes/assets/87250597/e70817ae-140b-4943-abd8-e585f5593556)




</br>

### Additional Information:
https://www.concretecms.com/

https://owasp.org/Top10/es/A03_2021-Injection/

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