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CVE-2024-47873

PhpSpreadsheet XmlScanner bypass leads to XXE

Published: Nov 18, 2024Updated: Mar 7, 2025 Sources: CVE List NVD GHSACWE-611
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.8%
Top 49.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-611

Affected Products

PhpSpreadsheetPHPOffice
Library
OSS Libraries / generic-library
phpspreadsheetphpoffice
Library
OSS Libraries / generic-library
phpoffice/phpspreadsheetPackagistOSS Libraries
phpoffice/phpexcelPackagistOSS Libraries
phpofficeoss-projectOSS Libraries
packagistpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Initial Access
View detailed technique mapping

References

https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-jw4x-v69f-hh5w
github.com
https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.php
github.com
https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing
owasp.org
and 3 more references View all →

Timeline

Published
Nov 18, 2024
Last Updated
Mar 7, 2025

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