CVE-2023-37914

XWiki Platform allows remote code execution via script macros

• CVSS 8.8
• CWE-94 Improper Control of Generation of Code ('Code Injection')
• Input Validation and Sanitization
• Remote

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user who can view `Invitation.WebHome` can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. This vulnerability has been patched on XWiki 14.4.8, 15.2-rc-1, and 14.10.6. Users are advised to upgrade. Users unable to upgrade may manually apply the patch on `Invitation.InvitationCommon` and `Invitation.InvitationConfig`, but there are otherwise no known workarounds for this vulnerability.

CVE

CVE-2023-37914

CWE

CWE-94 Improper Control of Generation of Code ('Code Injection')

CVSS base score

8.8

Published

2023-08-17

OWASP

A08 Software and Data Integrity Failures

Orthogonal defect classification

Function

Code defect classification

Incorrect Functionality

Category

Input Validation and Sanitization

Subcategory

Insecure Direct Object References (IDOR)

Accessibility scope

Remote

Impact

Arbitrary Code Execution

Fixed by upgrading

Yes

Solution

Upgrade XWiki to version 14.4.8, 15.2-rc-1, or 14.10.6.

def execute_macro(macro_code):
    """Vulnerable function that demonstrates the security issue."""
    exec(macro_code)

macro_input = "import os; os.system('echo Vulnerable!')"
execute_macro(macro_input)

import ast

def execute_macro(macro_code):
    """Secure function that fixes the vulnerability."""
    try:
        result = ast.literal_eval(macro_code)
        print(f"Macro result: {result}")
        return result
    except Exception:
        raise ValueError("Invalid or unsafe macro code.")

macro_input = "import os; os.system('echo Vulnerable!')"
execute_macro(macro_input)

@misc{vaitp:cve202337914,
  title        = {{XWiki Platform allows remote code execution via script macros}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2023},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2023-37914},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2023-37914/}}
}