CVE-2018-11761

Summary In a recent research on Apache Tika, I found a DOS Denial of Service vulnerability existed on its XML parser. It is caused that the parser improperly parses XML document. Affected Version Tested on ElasticSearch 6.3.1 using Tika 1.18 and 6.2.3 using Tika 1.17 Analysis As we know, the core...

Elasticsearch 8.18.6, 8.19.3, 9.0.6, and 9.1.3 Security Update (ESA-2025-14) (CVE-2025-54988)

Elasticsearch XML external entity XXE injection in Apache Tika ESA-2025-14 On August 20, 2025, CVE-2025-54988 in Apache Tika PDF parser module was announced, disclosing an XML External Entity injection flaw in the Apache Tika tika-parser-pdf-module. This vulnerability allows an attacker to provid...

Elasticsearch ingest-attachment Apache Tika XFA XXE Local File Read

This module validates CVE-2025-54988 / CVE-2025-66516 through an Elasticsearch ingest pipeline using the attachment processor. It creates a temporary pipeline, submits an in-memory PDF containing crafted XFA data to the simulate API, extracts a caller-selected local file, and removes the pipeline...