A critical security vulnerability has been discovered in Apache Tika’s PDF parser module that could enable attackers to access sensitive data and trigger malicious requests to internal systems.

The flaw, designated as CVE-2025-54988, affects multiple versions of the widely used document parsing library and has been assigned a critical severity rating by security researchers.

Key Takeaways
1. The XXE vulnerability in Apache Tika PDF parser allows data theft via malicious XFA-embedded PDFs.
2. Enables file access, internal network reconnaissance, and SSRF attacks.
3. Upgrade immediately - affects multiple enterprise packages.

Overview of XXE Vulnerability

The vulnerability stems from an XML External Entity (XXE) injection weakness in Apache Tika’s PDF parser module (org.apache.tika:tika-parser-pdf-module).

Security researchers Paras Jain and Yakov Shafranovich of Amazon discovered that versions 1.13 through 3.2.1 are susceptible to exploitation through specially crafted XFA (XML Forms Architecture) files embedded within PDF documents.

The attack vector involves manipulating XFA content within PDF files to trigger XXE processing, which can lead to unauthorized data disclosure and server-side request forgery attacks.

XFA technology, developed by Adobe, allows PDF documents to contain dynamic form content using XML structures. However, the improper handling of external entity references in these XML structures creates a pathway for malicious exploitation.

The vulnerability affects multiple Apache Tika packages that depend on the PDF parser module, including tika-parsers-standard-modules, tika-parsers-standard-package, tika-app, tika-grpc, and tika-server-standard.

This broad impact significantly increases the potential attack surface across enterprise environments that rely on Tika for document processing capabilities.

Risk Factors	Details
Affected Products	– Apache Tika PDF parser module (org.apache.tika:tika-parser-pdf-module) 1.13 through 3.2.1- tika-parsers-standard-modules- tika-parsers-standard-package- tika-app- tika-grpc- tika-server-standard
Impact	Unauthorized access to sensitive data
Exploit Prerequisites	– Ability to submit malicious PDF file to Tika parser- PDF must contain crafted XFA (XML Forms Architecture) content- Target system running vulnerable Tika version- Minimal user interaction required
Severity	Critical

Mitigations

Security experts emphasize the urgency of addressing this vulnerability due to its potential for sensitive data exfiltration and internal network reconnaissance.

Attackers could exploit the XXE weakness to read local files, access internal network resources, or force the vulnerable system to make requests to attacker-controlled servers, potentially leading to data leakage or further system compromise.

Organizations using affected versions should immediately upgrade to Apache Tika version 3.2.2, which contains the necessary security fixes to address the XXE vulnerability.

The Apache Software Foundation released this patched version specifically to mitigate the identified security risk.

System administrators should also implement additional security measures, including input validation for PDF uploads, network segmentation to limit potential XXE exploitation impact, and monitoring for suspicious XML processing activities.

Given the critical nature of this vulnerability and the widespread use of Apache Tika in enterprise document processing workflows, security teams should prioritize this update in their vulnerability management programs.

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