Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in KlbTheme Machic Core allows DOM-Based XSS
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in KlbTheme Machic Core allows DOM-Based XSS
AI Analyst Comment
Remediation
Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs.
Description Summary:
KlbTheme Machic Core is vulnerable to DOM-based cross-site scripting (XSS) due to improper neutralization of user-supplied input during web page generation.
Executive Summary:
The KlbTheme Machic Core plugin contains a DOM-based cross-site scripting vulnerability that could allow an unauthenticated attacker to execute malicious scripts in a user's browser.
Vulnerability Details
CVE-ID: CVE-2023-49186
Affected Software: KlbTheme Machic Core
Affected Versions: n/a through 1.2.6
Vulnerability: This is a DOM-based cross-site scripting (XSS) vulnerability, classified as CWE-79, where improper input neutralization allows the execution of arbitrary scripts. The vulnerability is exploitable by an unauthenticated attacker via a web-based attack vector.
Business Impact
Successful exploitation of this vulnerability allows attackers to execute malicious JavaScript in the context of an authenticated user's session. This can lead to unauthorized actions performed on behalf of the victim, theft of session cookies, or the redirection of users to malicious websites, resulting in potential data compromise and reputational harm. Given the CVSS score of 7.1, this represents a high-severity risk to web application integrity.
Remediation Plan
Immediate Action: Users should restrict the use of the Machic Core plugin until a security patch is provided by the vendor, as no official fix is currently confirmed.
Proactive Monitoring: Security teams should monitor web access logs for suspicious URL parameters containing script tags or encoded payloads associated with XSS patterns.
Compensating Controls: Deploy a Web Application Firewall (WAF) with robust XSS filtering rules to inspect incoming traffic and block malicious payloads targeting the affected plugin endpoints.
Exploitation Status
Public Exploit Available: No (exploit_available: false).
Analyst Notes: As of January 7, 2026, there is no public information indicating active exploitation or a published proof-of-concept for this vulnerability. While DOM-based XSS requires victim interaction, the low complexity of the attack vector makes it a viable target for automated scanning and exploitation.
Analyst Recommendation
Due to the high severity of this XSS vulnerability, organizations should prioritize the identification of all instances of the Machic Core plugin within their environment. If an update from the vendor becomes available, it must be applied immediately to neutralize the risk of script injection. Until such time, administrators should limit the exposure of the affected software through network-level controls or by disabling the plugin entirely.