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expat 2.1.0 and earlier 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.
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01 Dec 2021 00:00Current
7.8High risk
Vulners AI Score7.8
CVSS 26.8
EPSS0.00058