XML External Entity Vulnerability in PHPSpreadsheet by PHPOffice
CVE-2024-45293

7.5HIGH

Key Information:

Vendor
PHPOffice
Status
PHPSpreadsheet
Vendor
CVE Published:
7 October 2024

Summary

The PHPSpreadsheet library, used for managing spreadsheet files in PHP, is susceptible to XML External Entity (XXE) injection due to an inadequate XML encoding check in its XLSX reader. This flaw arises when an attacker modifies the XML structure by strategically placing whitespace within the encoding attribute. If an application permits users to upload Excel spreadsheets, this vulnerability can be leveraged to disclose sensitive server files and information, as the security scanner fails to adequately validate the XML encoding. Users are strongly encouraged to upgrade to versions 1.29.1, 2.1.1, or 2.3.0 to mitigate this risk.

References

https://github.com/PHPOffice/PhpSpreadsheet/security/advi...

EPSS Score

21% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

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