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CVE-2021-47931— Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication

Quick assessment

Affected
Exponentcms Exponent CMS
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.

Exponent CMS是Exponent公司的一个提供页面管理与模块化内容编辑能力的网站内容管理系统。 Exponent CMS 2.6版本存在跨站脚本漏洞，该漏洞源于文本编辑端点中的标题和文本块参数存在存储型跨站脚本漏洞，允许认证攻击者注入恶意脚本，攻击者可以注入带有嵌入式SVG onload事件的iframe有效载荷执行任意JavaScript，同时应用程序在响应中暴露数据库凭据，且认证端点缺乏暴力破解保护。

CVSS 6.4 · Medium EPSS 0.21% · P11

Affected Version Matrix 1

VendorProduct Version RangeStatus
Exponentcms Exponent CMS ≤ 2.6 affected
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I. Basic Information for CVE-2021-47931

Vulnerability Information
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Vulnerability Title
Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
Exponent CMS 2.6 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the Title and Text Block parameters in the text editing endpoint. Attackers can inject iframe payloads with embedded SVG onload events to execute arbitrary JavaScript. The application also exposes database credentials in responses and lacks brute-force protection on authentication endpoints.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
Vulnerability Title
Exponent CMS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Exponent CMS是Exponent公司的一个提供页面管理与模块化内容编辑能力的网站内容管理系统。 Exponent CMS 2.6版本存在跨站脚本漏洞，该漏洞源于文本编辑端点中的标题和文本块参数存在存储型跨站脚本漏洞，允许认证攻击者注入恶意脚本，攻击者可以注入带有嵌入式SVG onload事件的iframe有效载荷执行任意JavaScript，同时应用程序在响应中暴露数据库凭据，且认证端点缺乏暴力破解保护。
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
Exponentcms Exponent CMS 0 ~ 2.6 -

II. Public POCs for CVE-2021-47931

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III. Intelligence Information for CVE-2021-47931

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Vendor Advisories for CVE-2021-47931 (1)

Exploits & Public PoCs for CVE-2021-47931 (1)

Vendor Pages for CVE-2021-47931 (1)

IV. Related Vulnerabilities

Same product: Exponent CMS
Same weakness: CWE-79

V. Comments for CVE-2021-47931

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