CVE-2025-64512
HIGH EPSS 19.2%
Published Nov 10, 20257mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
Published Nov 10, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
19.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available
Weaknesses 1
CWE-502 Deserialization of Untrusted Data Validation
Affected Products 2
References 5
- github.com https://github.com/pdfminer/pdfminer.six/commit/b808ee05dd7f0c8ea8ec34bdf394d40e63501086
- github.com https://github.com/pdfminer/pdfminer.six/releases/tag/20251107
- github.com https://github.com/pdfminer/pdfminer.six/security/advisories/GHSA-wf5f-4jwr-ppcp
- lists.debian.org https://lists.debian.org/debian-lts-announce/2025/11/msg00017.html
- lists.debian.org https://lists.debian.org/debian-lts-announce/2026/01/msg00005.html
Remediation
- github.com https://github.com/pdfminer/pdfminer.six/commit/b808ee05dd7f0c8ea8ec34bdf394d40e63501086