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CVE-2021-42839— Grand Vice info Co. webopac7 - Arbitrary File Upload

Quick assessment

Affected
Grand Vice info Co. webopac7
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

欣学英资讯 Webopac7是中国欣学英资讯公司的一种在线公共访问目录。用于用户通过 Internet 使用图书馆的服务。 欣学英资讯 webopac7 存在代码问题漏洞，该漏洞源于文件上传功能无法过滤特殊字符。 远程攻击者在以普通用户权限登录的情况下，可以上传恶意脚本并执行任意代码来控制系统或中断服务。

CVSS 8.8 · High EPSS 2.35% · P82

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-42839

Vulnerability Information
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Vulnerability Title
Grand Vice info Co. webopac7 - Arbitrary File Upload
Source: CVE Program / CVE List V5
Vulnerability Description
Grand Vice info Co. webopac7 file upload function fails to filter special characters. While logging in with general user’s permission, remote attackers can upload malicious script and execute arbitrary code to control the system or interrupt services.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
欣学英资讯 webopac7 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
欣学英资讯 Webopac7是中国欣学英资讯公司的一种在线公共访问目录。用于用户通过 Internet 使用图书馆的服务。 欣学英资讯 webopac7 存在代码问题漏洞，该漏洞源于文件上传功能无法过滤特殊字符。 远程攻击者在以普通用户权限登录的情况下，可以上传恶意脚本并执行任意代码来控制系统或中断服务。
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
Grand Vice info Co. webopac7 7.1.20160701 -

II. Public POCs for CVE-2021-42839

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-42839

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Other References for CVE-2021-42839 (1)

IV. Related Vulnerabilities

Same product: webopac7
Same vendor: Grand Vice info Co.
Same weakness: CWE-434

V. Comments for CVE-2021-42839

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