pdfminer.six before 20251230 contains an insecure deserialization vulnerability in the CMap loading mechanism. The library uses Python pickle to deserialize CMap cache files without validation. An attacker with the ability to place a malicious pickle file in a location accessible to the application can trigger arbitrary code execution or privilege escalation when the file is loaded by a trusted process. This is caused by an incomplete patch to CVE-2025-64512.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8837-1 advisory.

    It was discovered that pdfminer did not safely parse specially crafted PDF files. An attacker could     possibly use these issues to execute arbitrary code. (CVE-2025-64512, CVE-2025-70559)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - pdfminer.six before 20251230 contains an insecure deserialization vulnerability in the CMap loading     mechanism. The library uses Python pickle to deserialize CMap cache files without validation. An attacker     with the ability to place a malicious pickle file in a location accessible to the application can trigger     arbitrary code execution or privilege escalation when the file is loaded by a trusted process. This is     caused by an incomplete patch to CVE-2025-64512. (CVE-2025-70559)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - pdfminer.six before 20251230 contains an insecure deserialization vulnerability in the CMap loading
    mechanism. The library uses Python pickle to deserialize CMap cache files without validation. An attacker
    with the ability to place a malicious pickle file in a location accessible to the application can trigger
    arbitrary code execution or privilege escalation when the file is loaded by a trusted process. This is
    caused by an incomplete patch to CVE-2025-64512. (CVE-2025-70559)

ID	Name	Product	Family	Type	Severity
350950	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : pdfminer vulnerabilities (USN-8837-1)	Nessus	Ubuntu Local Security Checks	Local	high
297747	Linux Distros Unpatched Vulnerability : CVE-2025-70559	Nessus	Misc.	Local	medium
435998	SCA: security update for pdfminer.six (GHSA-f83h-ghpp-7wcc)	Tenable Cloud Security	SCA Checks	Local	medium
435998	SCA: security update for pdfminer.six (GHSA-f83h-ghpp-7wcc)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2025-70559

medium

Tenable Plugins

high

medium

medium

medium