XML External Entity (XEE) Attack is a vulnerability where an XML parser processes external entity declarations, enabling attackers to access local files, perform server-side requests, or cause other unintended actions.
XML External Entity (xee) Attack is a vulnerability tracked across 2 threat clusters and 10 intelligence report mentions on ThreatCluster. First observed November 24, 2025; most recent activity December 2, 2025.
XML External Entity (XEE) Attack is a vulnerability where an XML parser processes external entity declarations, enabling attackers to access local files, perform server-side requests, or cause other unintended actions. In the Ubuntu/OpenJDK ecosystem, multiple advisories across OpenJDK versions (8, 17, 21, 25) and CRaC JDK builds have patched XEE flaws, underscoring its ongoing significance for Java-based deployments and containers.
Several critical security vulnerabilities were identified in various versions of OpenJDK, affecting Ubuntu 25.10 and its derivatives. The issues include improper handling of encoded strings and XML External Entity (XEE)…
OpenJDK versions 21 and 25 have been found to contain vulnerabilities that allow unauthenticated remote attackers to potentially modify files or leak sensitive information. The issues were discovered in the Security…
XML External Entity (XEE) Attack is a vulnerability where an XML parser processes external entity declarations, enabling attackers to access local files, perform server-side requests, or cause other unintended actions.
The most recent intelligence report mentioning XML External Entity (xee) Attack on ThreatCluster is dated December 2, 2025. Activity was first observed November 24, 2025, giving a tracked span from then to December 2, 2025.
Across ThreatCluster reporting, XML External Entity (xee) Attack most frequently co-occurs with Data Breach, Zero-day Exploit, Ubuntu, CVE-2025-53057, CVE-2025-53066, among 12 tracked related entities.
The most significant recent cluster is “Multiple OpenJDK Vulnerabilities Discovered in Ubuntu 25.10 and Derivatives” (11 articles · Updated December 2, 2025). XML External Entity (xee) Attack appears across 2 threat clusters in total, listed above with sources.
XML External Entity (xee) Attack appears in 10 intelligence report mentions across 2 deduplicated threat clusters, aggregated from 17,000+ monitored sources.