CVE-2024-47873

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.

Weakness classification

• security-advisories@github.com: CWE-611

Primary references

• security-advisories@github.com — Product
• security-advisories@github.com — Exploit, Vendor Advisory
• security-advisories@github.com — Not Applicable
• security-advisories@github.com — Technical Description