CVE-2025-63917: PDFPatcher thru 1.1.3.4663 executable's XML bookmark import functionality does not restrict XML external entit

Q: How do I fix CVE-2025-63917?

pdfpatcher: upgrade to newer than 1.1.3.4663. Exact commands for each OS are on this page.

Q: Is CVE-2025-63917 being exploited?

CVE-2025-63917 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-63917 affect?

CVE-2025-63917 affects pdfpatcher. Severity is high (CVSS 7.1). 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

Q: How urgent is CVE-2025-63917?

Priority 39/100. High severity; Public exploit reference

Routine

HIGH 7.1UPGRADE

CVE-2025-63917 is a high-severity flaw (CVSS 7.1) affecting pdfpatcher. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 e

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-611
Published	2025-11-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cnblogs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-17 17:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

cnblogs pdfpatcher UPGRADE

Affected: <= 1.1.3.4663

Fixed in: newer than 1.1.3.4663

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pdfpatcher || rpm -q pdfpatcher || pdfpatcher --version

2. UPGRADE to newer than 1.1.3.4663 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pdfpatcher

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pdfpatcher

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-63917?

pdfpatcher: upgrade to newer than 1.1.3.4663. Exact commands for each OS are on this page.

Is CVE-2025-63917 being exploited?

CVE-2025-63917 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-63917 affect?

CVE-2025-63917 affects pdfpatcher. Severity is high (CVSS 7.1). 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

How urgent is CVE-2025-63917?

Priority 39/100. High severity; Public exploit reference

Related CVEs

CVE-2025-63918 MEDIUM 6.2 UPGRADE PDFPatcher executable does not validate user-supplied file paths, allowing directory traversal attacks allowin

References

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