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CVE-2024-48917— XXE in PHPSpreadsheet's XLSX reader

Quick assessment

Affected
PHPOffice PhpSpreadsheet
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 7.5 · High EPSS 0.72% · P51

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-48917

Vulnerability Information
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Vulnerability Title
XXE in PHPSpreadsheet's XLSX reader
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
PhpSpreadsheet 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PHPOffice PhpSpreadsheet < 1.29.4 -

II. Public POCs for CVE-2024-48917

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 5943 chars
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III. Intelligence Information for CVE-2024-48917

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Vendor Advisories for CVE-2024-48917 (1)

News Coverage for CVE-2024-48917 (1)

IV. Related Vulnerabilities

Same product: PhpSpreadsheet
Same vendor: PHPOffice
Same weakness: CWE-611

V. Comments for CVE-2024-48917

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