Vulnerability Information
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Vulnerability Title
XXE in PHPSpreadsheet's XLSX reader
Vulnerability Description
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. The `XmlScanner` class has a scan method which should prevent XXE attacks. However, in a bypass of the previously reported `CVE-2024-47873`, the regexes from the `findCharSet` method, which is used for determining the current encoding can be bypassed by using a payload in the encoding UTF-7, and adding at end of the file a comment with the value `encoding="UTF-8"` with `"`, which is matched by the first regex, so that `encoding='UTF-7'` with single quotes `'` in the XML header is not matched by the second regex. An attacker can bypass the sanitizer and achieve an XML external entity attack. Versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0 fix the issue.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Vulnerability Title
PhpSpreadsheet 代码问题漏洞
Vulnerability Description
PhpSpreadsheet是PHPOffice开源的一款用于读取和写入电子表格文件的PHP库。 PhpSpreadsheet存在代码问题漏洞，该漏洞源于攻击者可以绕过清理器并实现XML外部实体攻击。
CVSS Information
N/A
Vulnerability Type
N/A