7.2

CVE-2026-3375

LiteSpeed Cache <= 7.7 - Unauthenticated Stored Cross-Site Scripting via QUIC.cloud CCSS/UCSS REST API Endpoints

LiteSpeed Cache <= 7.7 - Unauthenticated Stored Cross-Site Scripting via QUIC.cloud CCSS/UCSS REST API Endpoints

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.
Mögliche Gegenmaßnahme
LiteSpeed Cache: Update to version 7.8, or a newer patched version
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellerlitespeedtech
≫
Produkt LiteSpeed Cache
Default Statusunaffected
Version <= 7.7
Version 0
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Weitere Schwachstelleninformationen
SystemWordPress Plugin
≫
Produkt LiteSpeed Cache
Version *-7.7
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.36% 0.276
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security@wordfence.com 7.2 3.9 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://www.wordfence.com/threat-intel/vulnerabilities/id/40fa29f5-525a-4986-91f9-0210a7594e46?source=cve
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/rest.cls.php#L108
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/cloud.cls.php#L2085
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/css.cls.php#L401
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/css.cls.php#L595
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/optimize.cls.php#L477
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/router.cls.php#L732
https://plugins.trac.wordpress.org/changeset/3473912/
https://www.wordfence.com/threat-intel/vulnerabilities/id/40fa29f5-525a-4986-91f9-0210a7594e46
Third Party Advisory