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.
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| Platforma | Paczka | Podatne wersje | Poprawka w wersji |
|---|---|---|---|
| Wtyczka WordPress | LiteSpeed Cache | <= 7.7 | 7.8 |
Odnośniki
- Wektor CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N- Słabość (CWE)
CWE-79- Platforma
- WordPress
- Paczka
LiteSpeed Cache- Ujawniono
- 26.05.2026
- Aktualizacja
- 11.10.2026 10:22
Źródła i licencje
Wordfence Intelligence - 40fa29f5-525a-4986-91f9-0210a7594e46 - Wordfence Intelligence
Copyright 1999-2026 The MITRE Corporation
Copyright 2012-2026 Defiant Inc.
This record contains material that is subject to copyright
Copyright 1999-2026 The MITRE Corporation
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Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.
https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/Wordfence Intelligence
Wordfence Intelligence - Defiant, Inc. Copyright Defiant, Inc. All rights reserved except as granted below. License grant, section 3.1 of the Wordfence Intelligence Terms and Conditions (January 26, 2026): Subject to this Agreement, Company hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute the Service. Any copy you make for such purposes is authorized provided that you reproduce Company’s copyright designation, this license, and the license of any disclosed Company licensor in any such copy. Full applicable Agreement: https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/
Historia podatności: LiteSpeed Cache
Wszystkie opisane podatności tej paczki (Wtyczka WordPress), od najnowszej. Widać, czy to jednorazowa wpadka, czy paczka, której trzeba pilnować.
- Wszystkich wpisów
- 23
- Pierwsza → ostatnia
- 12.2020 09.2026
- Bez poprawki
- 0
- Wykorzystywana w atakach
- 0
Rozkład istotności
- Krytyczna 1
- Wysoka 7
- Średnia 15
Ujawnienia w latach
- 2020: 1
- 2021: 2
- 2022: 0
- 2023: 2
- 2024: 11
- 2025: 2
- 2026: 5
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LiteSpeed Cache <= 7.7 - Unauthenticated Stored Cross-Site Scripting via QUIC.cloud CCSS/UCSS REST API Endpoints ten wpis
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