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CVE-2024-47873— PhpSpreadsheet XmlScanner bypass leads to XXE

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程序并实现XML外部实体攻击。

CVSS 7.5 · High EPSS 0.74% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-47873

Vulnerability Information
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Vulnerability Title
PhpSpreadsheet XmlScanner bypass leads to XXE
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, prior to versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0, the regexes used in the `scan` method and the findCharSet method can be bypassed by using UCS-4 and encoding guessing. 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程序并实现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-2024-47873

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 12849 chars
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III. Intelligence Information for CVE-2024-47873

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Vendor Advisories for CVE-2024-47873 (1)

News Coverage for CVE-2024-47873 (1)

Other References for CVE-2024-47873 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2024-47873

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