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Tool Directory

CVE-2023-40000

HighPublished

WordPress LiteSpeed Cache plugin <= 5.7 - Unauthenticated Site Wide Stored XSS vulnerability

Published: Apr 16, 2024
Updated: Apr 28, 2026
Assigning CNA: Patchstack
Evidence observed: Aug 8, 2026

Primary CVSS

8.3/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

EPSS probability estimate

54.9%

High · next 30 days

Percentile: 99.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

cve-2023-40000Exploit
Proof-of-concept exploit for CVE-2023-40000 targeting WordPress LiteSpeed Cache plugin versions < 5.7.0.1. Supports check and attack modes, with XSS payload that creates an admin user.
CVE-2023-40000Detection
LiteSpeed Cache plugin for WordPress that could enable unauthenticated users to escalate their privileges
litespeed-cache-xss-pocPoC
PoC for XSS vulnerability in the LiteSpeed Cache WordPress plugin (CVE-2023-40000) allowing elevated privileges. Includes code, explanations, and mitigations.

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