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Advisories

exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values

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severity
high
date
Affecting

  • exceljs <= 4.4.0

CWE
  • CWE-1236 Improper Neutralization of Formula Elements in a CSV File
CVSS
8.4
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Credit
Matéo Florian Callec
Description
exceljs-hardened versions before 5.0.0 fail to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Attackers who can influence exported cell values can inject formulas that execute when the CSV file is opened in a spreadsheet application, potentially exfiltrating data or performing other malicious actions.

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