{"id":9043,"date":"2025-12-09T10:03:40","date_gmt":"2025-12-09T10:03:40","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2025\/12\/09\/500-apache-tika-toolkit-instances-vulnerable-to-critical-xxe-attack-exposed-online\/"},"modified":"2025-12-09T10:03:40","modified_gmt":"2025-12-09T10:03:40","slug":"500-apache-tika-toolkit-instances-vulnerable-to-critical-xxe-attack-exposed-online","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2025\/12\/09\/500-apache-tika-toolkit-instances-vulnerable-to-critical-xxe-attack-exposed-online\/","title":{"rendered":"500+ Apache Tika Toolkit Instances Vulnerable to Critical XXE Attack Exposed Online"},"content":{"rendered":"

500+ Apache Tika Toolkit Instances Vulnerable to Critical XXE Attack Exposed Online
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Over 565 internet-exposed Apache Tika Server instances are vulnerable to a critical XML External Entity (XXE)<\/a> injection flaw.<\/p>\n

That could enable attackers to steal sensitive data, launch denial-of-service attacks, or conduct server-side request forgery operations.<\/p>\n

The vulnerability, tracked as CVE-2025-66516<\/a>, affects tika-core versions 1.13.0 through 3.2.1 and carries a maximum CVSS severity score of 10.0.<\/p>\n

Apache disclosed the flaw on December 4, 2025, prompting immediate concern among organizations that rely on the popular content analysis toolkit.<\/p>\n

Apache Tika processes various document formats to extract metadata<\/a> and text content. The vulnerability allows attackers to exploit XXE injection by embedding a malicious XFA file inside a PDF document.<\/p>\n

When Tika processes this crafted file, it enables unauthorized access to internal resources.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Field<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
CVE-ID<\/strong><\/td>\nCVE-2025-66516<\/td>\n<\/tr>\n
CVSS Score<\/strong><\/td>\n10.0 (Critical)<\/td>\n<\/tr>\n
Vulnerability Type<\/strong><\/td>\nXML External Entity (XXE) Injection<\/td>\n<\/tr>\n
Attack Vector<\/strong><\/td>\nCrafted XFA file inside PDF<\/td>\n<\/tr>\n
Potential Impact<\/strong><\/td>\nData exfiltration, DoS, SSRF<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Successful exploitation permits remote attackers to read confidential files from vulnerable servers<\/a>. Exhaust system resources to cause service disruptions, or abuse the server to make requests to internal network resources.<\/p>\n

This could expose backend systems, databases, or cloud metadata endpoints that should remain protected behind firewalls<\/a>.<\/p>\n

Security research firm Censys identified<\/a> 565 potentially vulnerable Tika Server instances accessible from the internet as of December 2025.<\/p>\n

These exposed systems span multiple countries and represent a significant attack surface for threat actors<\/a> scanning for unpatched installations.<\/p>\n

Organizations running Apache Tika Server should immediately upgrade tika-core to version 3.2.2 or later. Applications that use Tika as a Maven dependency must also update tika-parsers to version 1.28.6 or higher, or tika-pdf-module to version 3.2.2 or higher.<\/p>\n

No proof-of-concept<\/a> exploit code has been publicly released, and no active exploitation has been reported at the time of disclosure.<\/p>\n

However, given the critical severity and straightforward attack method, security teams should prioritize patching before attackers develop working exploits.<\/p>\n

Follow us on Google News<\/a>, LinkedIn<\/a>, and X<\/a> for daily cybersecurity updates. Contact us<\/a> to feature your stories.<\/strong><\/p>\n

The post 500+ Apache Tika Toolkit Instances Vulnerable to Critical XXE Attack Exposed Online<\/a> appeared first on Cyber Security News<\/a>.<\/p>\n<\/div>\n

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500+ Apache Tika Toolkit Instances Vulnerable to Critical XXE Attack Exposed Online Over 565 internet-exposed Apache Tika Server instances are vulnerable to a critical XML External Entity (XXE) injection flaw. That could enable attackers to steal sensitive data, launch denial-of-service attacks, or conduct server-side request forgery operations. The vulnerability, tracked as CVE-2025-66516, affects tika-core versions […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[129,63,131,648],"tags":[130],"class_list":["post-9043","post","type-post","status-publish","format-standard","hentry","category-cyber-security","category-cyber-security-news","category-vulnerability","category-vulnerability-news","tag-cyber-security-news"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9043"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=9043"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9043\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=9043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=9043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=9043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}