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CVE-2023-1720— Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload

Quick assessment

Affected
Bitrix24 Bitrix24
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.

Bitrix24是美国Bitrix公司的一套企业社交平台。该平台包括在线通讯、日历管理和CRM（客户关系管理）等功能。 Bitrix24 22.0.300版本存在安全漏洞，该漏洞源于缺少mime类型的响应头，导致攻击者可以在受害者的浏览器中执行任意JavaScript代码。

CVSS 9.6 · Critical EPSS 0.85% · P57
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I. Basic Information for CVE-2023-1720

Vulnerability Information
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Vulnerability Title
Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload
Source: CVE Program / CVE List V5
Vulnerability Description
Lack of mime type response header in Bitrix24 22.0.300 allows authenticated remote attackers to execute arbitrary JavaScript code in the victim's browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via uploading a crafted HTML file through /desktop_app/file.ajax.php?action=uploadfile.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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
Bitrix24 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bitrix24是美国Bitrix公司的一套企业社交平台。该平台包括在线通讯、日历管理和CRM（客户关系管理）等功能。 Bitrix24 22.0.300版本存在安全漏洞，该漏洞源于缺少mime类型的响应头，导致攻击者可以在受害者的浏览器中执行任意JavaScript代码。
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
Bitrix24 Bitrix24 0 ~ 22.0.300 -

II. Public POCs for CVE-2023-1720

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III. Intelligence Information for CVE-2023-1720

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Other References for CVE-2023-1720 (1)

Same Patch Batch · Bitrix24 · 2023-11-01 · 8 CVEs total

CVE-2023-1717 9.6 CRITICAL Bitrix24 Cross-Site Scripting (XSS) via Client-side Prototype Pollution
CVE-2023-1716 9.0 CRITICAL Bitrix24 Stored Cross-Site Scripting (XSS) via Improper Input Neutralization on Invoice Ed
CVE-2023-1715 9.0 CRITICAL Bitrix24 Stored Cross-Site Scripting (XSS) via Improper Input Neutralization on Invoice Ed
CVE-2023-1714 8.8 HIGH Bitrix24 Remote Command Execution (RCE) via Unsafe Variable Extraction
CVE-2023-1713 8.8 HIGH Bitrix24 Remote Command Execution (RCE) via Insecure Temporary File Creation
CVE-2023-1719 7.5 HIGH Bitrix24 Insecure Global Variable Extraction
CVE-2023-1718 7.5 HIGH Bitrix24 Denial-of-Service (DoS) via Improper File Stream Access

IV. Related Vulnerabilities

Same product: Bitrix24
Same vendor: Bitrix24
Same weakness: CWE-434

V. Comments for CVE-2023-1720

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