CVE-2022-23466 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting the kitabisa teler product, specifically versions >= v2.0.0-rc and < v2.0.0-rc.4, as well as version v2.0.0-dev. Teler is a real-time intrusion detection and threat alert dashboard that displays log data from an event stream via the `/events` endpoint. The vulnerability arises because the log data displayed on the dashboard is not properly sanitized before being rendered in the user's browser. This improper neutralization of input (CWE-79) allows an attacker to inject malicious DOM scripting payloads into the logs, which are then executed in the context of authenticated users viewing the dashboard. Exploitation requires that the attacker can cause a malicious script to be included in the event stream logs, which then triggers execution when an authenticated user accesses the dashboard. The vulnerability is limited to authenticated users and depends on the presence of malicious payloads in the logs generated by detected threats. The issue was fixed in version v2.0.0-rc.4, and no known workarounds exist other than upgrading. There are no known exploits in the wild at this time. The vulnerability is classified as medium severity by the vendor, reflecting its limited scope and exploitation requirements.

For European organizations using kitabisa teler versions prior to v2.0.0-rc.4, this vulnerability could lead to unauthorized script execution within the context of the teler dashboard. This can result in session hijacking, unauthorized actions on behalf of the authenticated user, or theft of sensitive information displayed on the dashboard. Since teler is used for real-time intrusion detection and threat alerting, compromise of the dashboard could undermine security monitoring efforts, potentially delaying detection and response to actual threats. The impact is primarily on confidentiality and integrity of the monitoring environment, with limited direct impact on availability. However, successful exploitation could facilitate further attacks or lateral movement within the network. The requirement for authentication and the need for malicious payloads in the logs reduce the attack surface, but insider threats or attackers who have already compromised some level of access could leverage this vulnerability to escalate privileges or persist undetected. Organizations relying on teler for security operations should consider this a risk to their security monitoring integrity.

The primary and only effective mitigation is to upgrade kitabisa teler to version v2.0.0-rc.4 or later, where the vulnerability has been fixed. Organizations should prioritize this upgrade in their patch management schedules. Additionally, as a defense-in-depth measure, organizations should: 1) Restrict access to the teler dashboard strictly to trusted and necessary personnel to minimize the risk of exploitation by unauthorized users. 2) Implement strict input validation and sanitization on any custom integrations or log sources feeding into teler to reduce the chance of malicious payloads entering the event stream. 3) Monitor logs and alerts for unusual or suspicious scripting payloads or anomalies in the event stream that could indicate attempted exploitation. 4) Employ Content Security Policy (CSP) headers on the teler web application to limit the execution of unauthorized scripts, if feasible. 5) Conduct regular security awareness training for users with dashboard access to recognize suspicious behavior or unexpected dashboard content. Since no workarounds exist, upgrading remains the critical step.