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.
CVE-2013-0340 is a security vulnerability that . Impacting 7 products from libexpat_project, from python, from apple and 4 others, organizations running these solutions should prioritize assessment and patching.
Documented in 2014, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.
2014-01-21T18:55:09.117
2025-11-25T17:15:47.723
Deferred
CVSSv2: 6.8 (MEDIUM)
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | libexpat_project | libexpat | < 2.4.0 | Yes |
| Application | python | python | < 3.6.15 | Yes |
| Application | python | python | < 3.7.12 | Yes |
| Application | python | python | < 3.8.12 | Yes |
| Application | python | python | < 3.9.7 | Yes |
| Operating System | apple | ipados | < 14.8 | Yes |
| Operating System | apple | iphone_os | < 14.8 | Yes |
| Operating System | apple | macos | < 11.6 | Yes |
| Operating System | apple | tvos | < 15.0 | Yes |
| Operating System | apple | watchos | < 8.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For libexpat_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.