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CVE-2026-1107— EyouCMS Member Avatar Diyajax.php check_userinfo unrestricted upload

Quick assessment

Affected
n/a EyouCMS
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.

EyouCMS是中国易优（Eyou）公司的一套基于ThinkPHP的开源内容管理系统（CMS）。 EyouCMS 1.7.1/5.0及之前版本存在代码问题漏洞，该漏洞源于对文件Diyajax.php中组件Member Avatar Handler的函数check_userinfo的参数viewfile的错误操作，可能导致不受限制的上传。

CVSS 6.3 · Medium EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1107

Vulnerability Information
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Vulnerability Title
EyouCMS Member Avatar Diyajax.php check_userinfo unrestricted upload
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in EyouCMS up to 1.7.1/5.0. Impacted is the function check_userinfo of the file Diyajax.php of the component Member Avatar Handler. Executing a manipulation of the argument viewfile can lead to unrestricted upload. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
EyouCMS 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EyouCMS是中国易优（Eyou）公司的一套基于ThinkPHP的开源内容管理系统（CMS）。 EyouCMS 1.7.1/5.0及之前版本存在代码问题漏洞，该漏洞源于对文件Diyajax.php中组件Member Avatar Handler的函数check_userinfo的参数viewfile的错误操作，可能导致不受限制的上传。
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
- EyouCMS 1.7.0 cpe:2.3:a:eyoucms:eyoucms:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1107

# POC Description Source Link Shenlong Link
1 A weakness has been identified in EyouCMS up to 1.7.1/5.0. Impacted is the function check_userinfo of the file Diyajax.php of the component Member Avatar Handler. Executing a manipulation of the argument viewfile can lead to unrestricted upload. The attack may be performed from remote. https://github.com/Iniivan13/CVE-2026-1107 POC Details
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default-local-qwen3.6 · 10897 chars
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III. Intelligence Information for CVE-2026-1107

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Vendor Advisories for CVE-2026-1107 (1)

Same Patch Batch · n/a · 2026-01-18 · 3 CVEs total

CVE-2025-15539 5.3 MEDIUM Open5GS sgwc s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of servic
CVE-2025-15537 5.3 MEDIUM Mapnik dbfile.cpp string_value heap-based overflow

IV. Related Vulnerabilities

Same product: EyouCMS
Same vendor: n/a
Same weakness: CWE-434

V. Comments for CVE-2026-1107

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