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CVE-2024-47873

7.5 · HIGH

PhpSpreadsheet is a PHP library for reading and writing spreadsheet files.

Published Nov 18, 2024CWE-611EPSS 0.74%

Overview

CVE-2024-47873 is a high-severity vulnerability. It was published on November 18, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.phpGitHubgithub.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-jw4x-v69f-hh5wRefowasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_ProcessingRefwww.w3.org/TR/xml/#sec-guessing-no-ext-info

How CyberStrike helps

Frequently asked questions

What is CVE-2024-47873?

CVE-2024-47873 is a high-severity vulnerability. It was published on November 18, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-47873?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-47873?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-47873?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-47873 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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