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I. Basic Information for CVE-2021-21260
Vulnerability Information

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Vulnerability Title
XSS in description field
Source: NVD (National Vulnerability Database)
Vulnerability Description
Online Invoicing System (OIS) is open source software which is a lean invoicing system for small businesses, consultants and freelancers created using AppGini. In OIS version 4.0 there is a stored XSS which can enables an attacker takeover of the admin account through a payload that extracts a csrf token and sends a request to change password. It has been found that Item description is reflected without sanitization in app/items_view.php which enables the malicious scenario.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
BigProf Online Invoicing System 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BigProf Online Invoicing System(OIS)是一套在线发票系统。 Online Invoicing System (OIS) 存在跨站脚本漏洞,攻击者可利用该漏洞通过提取csrf令牌并发送更改密码请求接管管理帐户。
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
VendorProductAffected VersionsCPESubscribe
bigprof-softwareonline-invoicing-system = 4.0 -
II. Public POCs for CVE-2021-21260
#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6389 chars
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III. Intelligence Information for CVE-2021-21260
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IV. Related Vulnerabilities
V. Comments for CVE-2021-21260

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