What is the CVSS score of CVE-2025-63917?

CVE-2025-63917 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L. EPSS exploitation probability: 0.2%.

Which versions of Pdfpatcher are affected by CVE-2025-63917?

CVE-2025-63917 presents moderate security risk, a XML external entity vulnerability rated CVSS 7.1. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2025-63917?

Yes, a public proof-of-concept exploit is available for CVE-2025-63917. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-63917?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Pdfpatcher CVE-2025-63917

HIGH

Improper Restriction of XML External Entity Reference (CWE-611)

2025-11-17 cve@mitre.org

Denial Of Service Information Disclosure SSRF XXE Pdfpatcher

7.1

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:22 vuln.today

PoC Detected

Jan 08, 2026 - 17:27 vuln.today

Public exploit code

CVE Published

Nov 17, 2025 - 17:15 nvd

HIGH 7.1

DescriptionNVD

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.

AnalysisAI

PDFPatcher thru 1.1.3.4663 executable's XML bookmark import functionality does not restrict XML external entity (XXE) references. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as XML External Entity (XXE) (CWE-611), which allows attackers to read arbitrary files or perform SSRF through XML processing. 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. Affected products include: Cnblogs Pdfpatcher.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Disable external entity processing in XML parsers, use JSON instead of XML where possible.

CVE-2025-63917 vulnerability details – vuln.today

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