XWiki-Platform - RCE (CVE-2024-21650)

CVE-2024-21650 is a critical remote code execution vulnerability in the XWiki Platform that allows unauthenticated attackers to execute arbitrary code by injecting malicious payloads into the "first name" or "last name" fields during user registration. This flaw affects all XWiki installations with guest registration enabled, potentially enabling full system compromise. Attackers could exploit this vulnerability to gain unauthorized access, manipulate data, or disrupt wiki operations.

CrowdSec has been tracking this vulnerability and its exploits since 24th of September 2025.

Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2024-21650 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2024-21650. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.

Attackers exploit the user registration endpoint /bin/register/XWiki/XWikiRegister by injecting malicious payloads into the register_first_name or register_last_name fields, leading to remote code execution on vulnerable XWiki installations.