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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| zendframework/zendframework1 | composer | >= 1.0, < 1.11.13 | 1.11.13 |
| zendframework/zendframework1 | composer | >= 1.12.0-rc1, < 1.12.0 | 1.12.0 |
The vulnerability stems from XML parsing functions that did not properly restrict DTDs or disable entity loading. The commit patches show these functions were modified to add libxml_disable_entity_loader(true) and explicit checks for XML_DOCUMENT_TYPE_NODE (DOCTYPE declarations). Before the patch, these functions used DOMDocument::loadXML/loadHTML or SimpleXMLElement without these safeguards, making them vulnerable to XEE attacks via recursive/circular entity references. The affected components (Zend_Dom, Zend_Feed, Zend_Soap, Zend_XmlRpc) all had their XML processing functions updated, confirming the vulnerable entry points.
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