CVE-2025-12440

Description

Inappropriate implementation in Autofill in Google Chrome prior to 142.0.7444.59 allowed a remote attacker who convinced a user to engage in specific UI gestures to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Low)

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

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-2025-12440 PoC - Chrome Autofill Information Disclosure -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-12440 PoC</title>
    <style>
        body { font-family: Arial, sans-serif; padding: 20px; }
        .form-container { max-width: 500px; margin: 0 auto; }
        input { width: 100%; padding: 10px; margin: 10px 0; }
        button { padding: 10px 20px; cursor: pointer; }
        #result { margin-top: 20px; padding: 10px; background: #f0f0f0; word-break: break-all; }
    </style>
</head>
<body>
    <div class="form-container">
        <h2>CVE-2025-12440 PoC</h2>
        <p>Enter data and interact with autofill fields:</p>
        
        <form id="leakForm">
            <input type="text" id="name" name="name" placeholder="Name" autocomplete="name">
            <input type="email" id="email" name="email" placeholder="Email" autocomplete="email">
            <input type="text" id="address" name="address" placeholder="Address" autocomplete="street-address">
            <input type="tel" id="phone" name="phone" placeholder="Phone" autocomplete="tel">
            <button type="button" onclick="triggerAutofillLeak()">Trigger Autofill</button>
        </form>
        
        <div id="result"></div>
    </div>

    <script>
        function triggerAutofillLeak() {
            // Simulate the vulnerability trigger mechanism
            // This PoC demonstrates the concept of autofill data extraction
            const inputs = document.querySelectorAll('input');
            const leakedData = [];
            
            inputs.forEach(input => {
                // In a real attack, this would access process memory
                // through the improper implementation
                if (input.value || input.autocomplete) {
                    leakedData.push({
                        field: input.name,
                        autocomplete: input.autocomplete,
                        value: input.value
                    });
                }
            });
            
            // Display extracted data (simulated)
            document.getElementById('result').innerHTML = 
                '<strong>Extracted Autofill Data:</strong><br>' +
                JSON.stringify(leakedData, null, 2);
            
            // In real attack, data would be exfiltrated to C2 server
            console.log('Leaked data:', leakedData);
        }
        
        // Simulate UI gesture detection
        document.addEventListener('mousemove', function(e) {
            // Track user interactions for triggering the vulnerability
            if (Math.random() > 0.99) {
                console.log('UI gesture detected');
            }
        });
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12440
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-12440
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-12440/
[4] VulDB https://vuldb.com/cve/CVE-2025-12440
[5] https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/430555440

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-12440", "sourceIdentifier": "[email protected]", "published": "2025-11-10T20:15:38.757", "lastModified": "2025-11-13T15:24:13.203", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in Autofill in Google Chrome prior to 142.0.7444.59 allowed a remote attacker who convinced a user to engage in specific UI gestures to obtain potentially sensitive information from process memory 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:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-120"}]}], "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/430555440", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}