CVE-2026-27502
📋 TL;DR
SVXportal versions 2.5 and earlier contain a reflected cross-site scripting vulnerability in the log.php file. Unauthenticated remote attackers can craft malicious URLs that, when visited by victims, execute arbitrary JavaScript in their browsers. This affects all users of vulnerable SVXportal installations.
💻 Affected Systems
- SVXportal
📦 What is this software?
Svxportal by Radioinorr
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full administrative access to the portal, and potentially compromise the underlying server or connected systems.
Likely Case
Attackers steal user session data to impersonate victims, perform unauthorized actions, or deface the portal interface.
If Mitigated
With proper input validation and output encoding, the vulnerability is eliminated and no exploitation is possible.
🎯 Exploit Status
Exploitation requires victim interaction with crafted URL but is trivial to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Apply manual fix by modifying log.php to sanitize search parameter input.
🔧 Temporary Workarounds
Input Sanitization Patch
allManually patch log.php to properly encode or sanitize the search parameter before output.
Edit log.php and replace unsanitized $_GET['search'] with htmlspecialchars($_GET['search'], ENT_QUOTES, 'UTF-8') in the input value attribute.
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious requests.
🧯 If You Can't Patch
- Restrict access to log.php to trusted IP addresses only via firewall or .htaccess rules.
- Implement Content Security Policy (CSP) headers to mitigate script execution impact.
🔍 How to Verify
Check if Vulnerable:
Access log.php?search=<script>alert('XSS')</script> and check if script executes in browser.Check Version:
Check SVXportal version in configuration files or admin interface.Verify Fix Applied:
Test with same payload after patching; script should not execute and should appear as encoded text.📡 Detection & Monitoring
Log Indicators:
- Unusual search parameter values containing script tags or JavaScript in log.php access logs.
Network Indicators:
- HTTP requests to log.php with suspicious parameters containing script tags or encoded payloads.
SIEM Query:
source="web_logs" AND uri="*log.php*" AND (param="*<script>*" OR param="*javascript:*")