CVE-2024-48917

Severity CVSS v4.0:

Pending analysis

Type:

CWE-611 Improper Restriction of XML External Entity Reference ('XXE')

Publication date:

18/11/2024

Last modified:

07/03/2025

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, in a bypass of the previously reported `CVE-2024-47873`, the regexes from the `findCharSet` method, which is used for determining the current encoding can be bypassed by using a payload in the encoding UTF-7, and adding at end of the file a comment with the value `encoding="UTF-8"` with `"`, which is matched by the first regex, so that `encoding=&#39;UTF-7&#39;` with single quotes `&#39;` in the XML header is not matched by the second regex. 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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:phpoffice:phpspreadsheet::::::::		1.29.4 (excluding)
cpe:2.3:a:phpoffice:phpspreadsheet::::::::	2.0.0 (including)	2.1.3 (excluding)
cpe:2.3:a:phpoffice:phpspreadsheet::::::::	2.2.0 (including)	2.3.2 (excluding)
cpe:2.3:a:phpoffice:phpspreadsheet::::::::	3.3.0 (including)	3.4.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-48917

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools