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CVE-2025-3566— veal98 小牛肉 Echo 开源社区系统 uploadMdPic unrestricted upload

Quick assessment

Affected
veal98 小牛肉 Echo 开源社区系统
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Echo是Veal98个人开发者的一套前后端不分离的开源社区系统。 Echo 4.2版本存在跨站脚本漏洞，该漏洞源于文件/discuss/uploadMdPic中参数editormd-image-file操作不当，可能导致任意文件上传。

CVSS 7.3 · High EPSS 0.44% · P38

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2025-3566

Vulnerability Information
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Vulnerability Title
veal98 小牛肉 Echo 开源社区系统 uploadMdPic unrestricted upload
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as critical, has been found in veal98 小牛肉 Echo 开源社区系统 4.2. This issue affects the function uploadMdPic of the file /discuss/uploadMdPic. The manipulation of the argument editormd-image-file leads to unrestricted upload. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Echo 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Echo是Veal98个人开发者的一套前后端不分离的开源社区系统。 Echo 4.2版本存在跨站脚本漏洞，该漏洞源于文件/discuss/uploadMdPic中参数editormd-image-file操作不当，可能导致任意文件上传。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
veal98 小牛肉 Echo 开源社区系统 4.2 -

II. Public POCs for CVE-2025-3566

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8664 chars
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Trigger conditions & impact
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III. Intelligence Information for CVE-2025-3566

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Vendor Advisories for CVE-2025-3566 (2)

Other References for CVE-2025-3566 (1)

IV. Related Vulnerabilities

Same product: Echo 开源社区系统
Same vendor: veal98 小牛肉
Same weakness: CWE-434

V. Comments for CVE-2025-3566

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