VULNERABILITY INTELLIGENCE

CVE-2013-0340

CVSS score6.8 MEDIUM
EPSS probability19.43%
CISA KEVNot currently listed
Published2014-01-21
Last modified2026-10-14
CVSS vectorAV:N/AC:M/Au:N/C:P/I:P/A:P

Description

expat before version 2.4.0 does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE.

Weakness classification

  • CWE-611: Improper Restriction of XML External Entity Reference

Primary references