CVE-2026-2098
📋 TL;DR
AgentFlow software by Flowring contains a reflected cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in users' browsers via phishing attacks. This affects all users of vulnerable AgentFlow installations who could be tricked into clicking malicious links. The vulnerability enables client-side code execution but doesn't directly compromise servers.
💻 Affected Systems
- AgentFlow by Flowring
📦 What is this software?
Agentflow by Flowring
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or capture sensitive data entered by users.
Likely Case
Attackers use phishing to steal session tokens or credentials, potentially leading to unauthorized access to the AgentFlow application.
If Mitigated
With proper input validation and output encoding, the attack would fail to execute malicious scripts.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited via phishing; no authentication required to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references; check vendor advisory for specific version
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-10700-3534d-2.html
Restart Required: Yes
Instructions:
1. Check Flowring's security advisory for patch details. 2. Download and apply the latest patch from Flowring. 3. Restart AgentFlow services. 4. Verify the fix by testing for XSS vulnerabilities.
🔧 Temporary Workarounds
Implement WAF Rules
allConfigure web application firewall to block XSS payloads in URL parameters
WAF configuration depends on specific product; create rules to sanitize <script> tags and JavaScript events
Content Security Policy
allImplement CSP headers to restrict script execution sources
Add header: Content-Security-Policy: script-src 'self'
🧯 If You Can't Patch
- Implement strict input validation on all user-controllable parameters
- Enable HTTP-only and secure flags on session cookies to limit impact of token theft
🔍 How to Verify
Check if Vulnerable:
Test URL parameters with XSS payloads like <script>alert('XSS')</script> and observe if script executesCheck Version:
Check AgentFlow version through web interface or configuration files (specific command depends on installation)Verify Fix Applied:
Retest with XSS payloads after patching; scripts should be properly encoded or blocked📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing <script> tags or JavaScript events in URL parameters
- Unusual redirect patterns in access logs
Network Indicators:
- Suspicious URLs with encoded script tags being accessed
- Phishing emails containing AgentFlow URLs with parameters
SIEM Query:
web.url:*<script>* OR web.url:*javascript:*