CVE-2023-40000: WordPress LiteSpeed Cache plugin <= 5.7 - Unauthenticated Site Wide Stored XSS vulnerability

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 54.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-04-16 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

LiteSpeed Technologies LiteSpeed Cache: before 5.7.0.1 — fixed in 5.7.0.1

How to fix

Upgrade to a fixed version: LiteSpeed Technologies LiteSpeed Cache 5.7.0.1. Check the vendor advisory for mitigations.

References

https://patchstack.com/database/vulnerability/litespeed-cache/wordpress-litespeed-cache-plugin-5-7-unauthenticated-site-wide-stored-xss-vulnerability?_s_id=cve
https://patchstack.com/database/vulnerability/litespeed-cache/wordpress-litespeed-cache-plugin-5-7-unauthenticated-site-wide-stored-xss-vulnerability?_s_id=cve
https://github.com/rxerium/CVE-2023-40000

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