How severe is CVE-2024-47873?

CVE-2024-47873 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-47873 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-47873?

CVE-2024-47873 affects Phpoffice Phpspreadsheet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-47873?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-47873 have an EU (EUVD) identifier?

Yes. CVE-2024-47873 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3279.

When was CVE-2024-47873 published?

CVE-2024-47873 was published on 2024-11-18 and last updated on 2026-06-17.

CVE-2024-47873

CVE-2024-47873 is a high-severity vulnerability in Phpoffice Phpspreadsheet with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-3279
Weakness: CWE-611
Affected product: Phpoffice Phpspreadsheet
Published: 2024-11-18
Last modified: 2026-06-17

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.

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.
How severe is CVE-2024-47873?: CVE-2024-47873 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-47873 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-47873?: CVE-2024-47873 affects Phpoffice Phpspreadsheet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-47873?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-47873 have an EU (EUVD) identifier?: Yes. CVE-2024-47873 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3279.
When was CVE-2024-47873 published?: CVE-2024-47873 was published on 2024-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*

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