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CVE-2025-64512

8.6 · HIGH

Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents.

Published Nov 10, 2025CWE-502EPSS 0.33%

Overview

CVE-2025-64512 is a high-severity vulnerability. It was published on November 10, 2025 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/pdfminer/pdfminer.six/commit/b808ee05dd7f0c8ea8ec34bdf394d40e63501086GitHubgithub.com/pdfminer/pdfminer.six/releases/tag/20251107GitHubgithub.com/pdfminer/pdfminer.six/security/advisories/GHSA-wf5f-4jwr-ppcpReflists.debian.org/debian-lts-announce/2025/11/msg00017.htmlReflists.debian.org/debian-lts-announce/2026/01/msg00005.htmlGitHubgithub.com/pdfminer/pdfminer.six/security/advisories/GHSA-wf5f-4jwr-ppcp

How CyberStrike helps

Frequently asked questions

What is CVE-2025-64512?

CVE-2025-64512 is a high-severity vulnerability. It was published on November 10, 2025 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2025-64512?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-64512?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-64512?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-64512 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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