Is CVE-2026-3375 actively exploited?

No active exploitation of CVE-2026-3375 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3375 be exploited remotely?

Yes. CVE-2026-3375 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3375?

CVE-2026-3375 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2026-3375

HIGH

CVE-2026-3375

CWE-79Published: May 27, 2026· Updated: May 27, 2026

7.2

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:20.2th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-3375 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.