Cross-site Scripting (XSS)

Overview @n8n/n8n-nodes-langchain is a Affected versions of this package are vulnerable to Cross-site Scripting XSS via the ChatTrigger template rendering in ChatTrigger/templates.ts. An authenticated user who can create or edit workflows can inject malicious JavaScript by supplying crafted Custo...

CVE-2026-56356 n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field

n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 fixed in 1.123.27, 2.13.3, and 2.14.1. An authenticat...

CVE-2026-56356

Summary: CVE-2026-56356 affects n8n’s Chat Trigger node Custom CSS field, where a misconfiguration of the sanitize-html library allows stored XSS. Affected versions: before 1.123.27; 2.0.0–2.13.2; 2.14.0. Impact: an authenticated user with workflow creation/modification rights can inject JavaScri...

PT-2026-54040

Name of the Vulnerable Software and Affected Versions n8n versions prior to 1.123.27 n8n versions 2.0.0 through 2.13.2 n8n version 2.14.0 Description A stored cross-site scripting issue exists in the Chat Trigger node's Custom CSS field caused by a misconfiguration of the sanitize-html library. A...

BIT-DISCOURSE-2026-44786 Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users

Discourse is an open-source discussion platform. From versions 2026.1.0 to before 2026.1.4, 2026.3.0 to before 2026.3.1, and 2026.4.0 to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat...

CVE-2026-44786 Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus...

CVE-2026-44786 Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus...

CVE-2026-27737

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

CVE-2026-39422

MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain a Stored Cross-Site Scripting XSS vulnerability through the application name or icon fields when creating an application. When a victim visits the public chat interface /ui/chat/accesstoken, the...

CVE-2026-27737

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

EUVD-2026-30811

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

CVE-2026-27737

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

CVE-2026-27737 BigBlueButton has Stored XSS in bbb-playback replay

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

CVE-2026-27737 BigBlueButton has Stored XSS in bbb-playback replay

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

CVE-2026-27737 BigBlueButton has Stored XSS in bbb-playback replay

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

CVE-2026-27737

CVE-2026-27737 affects BigBlueButton prior to version 3.0.19 . The issue arises in the recording playback (presentation format) where user input in the public chat was not sanitized, enabling a targeted XSS attack when replaying the recording. Root cause: missing input sanitization in the bbb-pla...

CVE-2026-27737: Improper Neutralization of Input During Web Page Generation

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback presentation format was not sanitizing user's input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording...

BigBlueButton 跨站脚本漏洞

BigBlueButton is an open-source web conferencing system developed by the BigBlueButton community. Versions of BigBlueButton prior to 3.0.19 contained a cross-site scripting vulnerability. This vulnerability stemmed from the failure to clean up user input in public chat areas during recording and...

PT-2026-41738

Name of the Vulnerable Software and Affected Versions BigBlueButton versions prior to 3.0.19 Description Recording playback in presentation format fails to sanitize user input within the public chat. This allows a malicious actor to execute a targeted Cross-Site Scripting XSS attack—a technique...

CVE-2026-41266

Flowise CVE-2026-41266 affects Flowise (drag-and-drop LLM workflow UI). Before version 3.1.0, GET/unauthenticated access to /api/v1/public-chatbotConfig/:id exposes sensitive data (API keys, HTTP Authorization headers, and internal configuration) without authentication. An attacker who only knows...