CVE-2024-47873: high-severity vulnerability in PHPOffice PhpSpreadsheet
PhpSpreadsheet XmlScanner bypass leads to XXE
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.7%
exploitation probability
0.7%top 47% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
PHPOffice · PhpSpreadsheetRelated CVEs — PHPOffice PhpSpreadsheet
In the same product, most dangerous first.
CVE-2024-45293HIGHXML External Entity Reference (XXE) in PHPSpreadsheet's XLSX readerEPSS 2.8%CVE-2024-45291MEDIUMPath traversal and Server-Side Request Forgery in HTML writer when embedding images is enabled in PHPSpreadsheetEPSS 0.9%CVE-2025-54370HIGHPhpSpreadsheet vulnerable to SSRF when reading and displaying a processed HTML document in the browserEPSS 0.8%CVE-2026-34084CRITICALPhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::loadEPSS 0.8%CVE-2024-48917HIGHXXE in PHPSpreadsheet's XLSX readerEPSS 0.7%CVE-2026-59932HIGHPhpSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustionEPSS 0.7%
References
https://github.com/PHPOffice/PhpSpreadsheet/blob/39fc51309181e82593b06e2fa8e45ef8333a0335/src/PhpSpreadsheet/Reader/Security/XmlScanner.phphttps://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-jw4x-v69f-hh5whttps://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processinghttps://www.w3.org/TR/xml/#sec-guessing-no-ext-info