CVE-2013-0340: expat before version 2.4.0 does not properly handle entities expansion unless an application developer uses...

Security readout for executives and security teams

CVE-2013-0340 concerns how older libexpat handles XML entity expansion. Applications that parse attacker-supplied XML may be exposed to denial of service, internal HTTP requests, or file reads, depending on parser configuration and application behavior. The record notes debate over whether this is an expat issue or application responsibility. Exposure is most likely indirect: products, services, or OS packages embedding older libexpat and parsing untrusted XML. Risk depends heavily on application parser configuration, XML input sources, and whether external entities are disabled. Treat as a targeted exposure review rather than an emergency by default. Prioritize internet-facing or partner-facing systems that accept XML, especially legacy platforms, because impact can include service disruption and internal data access. Mitigation focus: Inventory applications and packages that embed or link libexpat.; Upgrade libexpat where vendor guidance identifies vulnerable versions.; Disable external entity expansion for XML parsing where supported..

Prepared

Jun 14, 2026, 14:50 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.