Zoho Manage Engine - XSS (CVE-2018-12998)

CVE-2018-12998 is a reflected cross-site scripting (XSS) vulnerability found in multiple Zoho ManageEngine products, including OpManager and related components. This flaw allows remote attackers to inject arbitrary web script or HTML by manipulating certain parameters in requests to the application’s servlet.

CrowdSec has been tracking this vulnerability and its exploits since 3rd of April 2025.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2018-12998 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2018-12998. 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.

Exploitation attempts are generally identifiable through requests directed at URLs containing /servlet/com.adventnet.me.opmanager.servlet.failoverhelperservlet.