CVE-2024-47873

HIGH
Published Nov 18, 2024 Modified Mar 7, 2025 CWE-611

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.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-611 CWE-611

Affected Products

Vendor Product
phpoffice phpspreadsheet
phpoffice phpspreadsheet
phpoffice phpspreadsheet
phpoffice phpspreadsheet

References

Frequently Asked Questions

What is CVE-2024-47873? +
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. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2024-47873? +
CVE-2024-47873 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-47873? +
CVE-2024-47873 affects products from phpoffice, specifically: phpspreadsheet. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-47873? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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