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Advisories

ExcelJS through 4.4.0 Arbitrary File Read via WorkbookWriter addImage Filename

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Severity
high
Date
Affecting

  • exceljs <= 4.4.0

CWE
  • CWE-73 External Control of File Name or Path
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
Matéo Florian Callec
Description
ExcelJS through 4.4.0 contains an arbitrary file read vulnerability in the streaming WorkbookWriter that allows attackers to read local files by supplying crafted image filenames to addImage. Attackers can inject ../ path segments into user-controlled image paths, causing addMedia to embed any file readable by the Node.js process under xl/media in the generated workbook.

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