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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
7.5HIGH
NVD MITRE
EPSS Score
0.7%
Top 47.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not 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.

No summary for this CVE yet.

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
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Weaknesses

CWE-611

Affected Products

Packagist
package-ecosystem
phpoffice/phpspreadsheet
OSS Libraries
phpoffice/phpexcel
OSS Libraries
PHPOffice
oss-project
PhpSpreadsheetLibrary
OSS Libraries / generic-library
and 1 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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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 →

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