LiteSpeed Cache - XSS (CVE-2023-40000)
Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LiteSpeed Technologies LiteSpeed Cache allows Stored XSS.This issue affects LiteSpeed Cache: from n/a through 5.7.
psychologyCrowdSec Analysis
CVE-2023-40000 is a vulnerability in LiteSpeed Cache that allows attackers to perform stored cross-site scripting (XSS) through improper input neutralization in web page generation.
CrowdSec has been tracking this vulnerability and its exploits since 20th of May 2025.
CrowdSec network data shows that most actors exploiting CVE-2023-40000 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2023-40000 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2023-40000 is currently experiencing high visibility and active exploitation across the internet.
Observed attack patterns focus on requests leveraging the /wp-json/litespeed/v1/cdn_status URL.
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| Event | Date |
|---|---|
| CVE Published | 2024-04-16 |
| Rule Released | 2025-05-20 |
| CrowdSec First Seen | 2025-05-20 |