PDFPatcher thru 1.1.3.4663 executable's XML bookmark import functionality does not restrict XML external entity (XXE) references. The application uses .NET's XmlDocument class without disabling external entity resolution, enabling attackers to: Read arbitrary files from the victim's filesystem, exfiltrate sensitive data via out-of-band (OOB) HTTP requests, perform SSRF attacks against internal network resources, or cause a denial of service via entity expansion attacks.
CVE-2025-63917
CVSS base score
7.1 (v3.1)
Severity
HIGH
Attack vector
Network
Weakness
CWE-611
Last modified
November 5, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L
Affected products
cnblogs pdfpatcher
References
- github.com Exploit, Third Party Advisory
- github.com Product
- www.cnblogs.com Product