CVE-2026-3375

Published: Mag 27, 2026 Last Modified: Mag 27, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,2
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none

Description

AI Translation Available

The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the /wp-json/litespeed/v1/notify_ccss and /wp-json/litespeed/v1/notify_ucss REST API endpoints in all versions up to, and including, 7.7. These endpoints accept CSS content from QUIC.cloud callback notifications and store it to disk without sanitization. The stored content is later rendered inline frontend page loads without output escaping. The access control protecting these endpoints is IP-based validation that can potentially be bypassed when the WordPress site is deployed behind a reverse proxy, load balancer, or CDN with certain configurations. This makes it possible for unauthenticated attackers, under certain conditions, to inject arbitrary JavaScript into CCSS/UCSS content.

79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Confidentiality Integrity Availability
Potential Impacts:
Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies: AI/ML, Web Based, Web Server
Likelihood of Exploit: High
View CWE Details
https://plugins.trac.wordpress.org/browser/litespeed-cache/…
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/cloud.cls.…
https://plugins.trac.wordpress.org/browser/litespeed-cache/…
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/css.cls.ph…
https://plugins.trac.wordpress.org/browser/litespeed-cache/…
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/css.cls.ph…
https://plugins.trac.wordpress.org/browser/litespeed-cache/…
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/optimize.c…
https://plugins.trac.wordpress.org/browser/litespeed-cache/…
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/rest.cls.p…
https://plugins.trac.wordpress.org/browser/litespeed-cache/…
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/router.cls…
https://plugins.trac.wordpress.org/changeset/3473912/
https://plugins.trac.wordpress.org/changeset/3473912/
https://www.wordfence.com/threat-intel/vulnerabilities/id/4…
https://www.wordfence.com/threat-intel/vulnerabilities/id/40fa29f5-525a-4986-91…