CVE-2025-63917

HIGH
MEDIUM Priority: 0.03 BB Relevance: 64/100
Published: 2025-11-17 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: None
A: Low

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
cnblogs pdfpatcher < 1.1.3.4663

Bug Bounty Relevance

64 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

7.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L

EPSS — Exploitation Probability

0.43%
Raw Score 0.004250
Percentile 37.3%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00425
2026-11-13
0.00425
2026-11-12
0.00425
2026-11-10
0.00425
2026-11-09
0.00425
2026-11-08
0.00425
2026-11-07
0.00425
2026-11-06
0.00425
2026-11-05
0.00425

Intelligence Sources

nvd ref →