Litespeed cache - XSS (CVE-2023-40000)
4Exploiting IPs reported
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.
CrowdSec 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.
Data from the CrowdSec community indicates that exploitation of CVE-2023-40000 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. In addition, according to the CrowdSec network, attack volume against CVE-2023-40000 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.
Observed attack patterns focus on requests leveraging the /wp-json/litespeed/v1/cdn_status URL.
Exploitation
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Common Weakness Enumeration (CWE)
Protection
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Blocklist
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