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CVE-2025-64512

Pdfminer Pdfminer.six insecure deserialization

8.6 HIGHPublic exploitEPSS 0.31%
  1. Published10 Nov 2025

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected products

Pdfminer Pdfminer.six< 2025-11-07
Debian Linux11.0

Remediation

Fixed in
Pdfminer Pdfminer.six≥ 2025-11-07

References

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Frequently asked

Is CVE-2025-64512 being actively exploited?

CVE-2025-64512 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.31%.

How severe is CVE-2025-64512?

CVE-2025-64512 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 0.31% probability of exploitation.

Which products are affected by CVE-2025-64512?

Affected products include Pdfminer Pdfminer.six, Debian Linux.

How do I fix CVE-2025-64512?

Upgrade affected software to a fixed version, for example Pdfminer Pdfminer.six 2025-11-07 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-64512 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.