EUVD-2026-86499

madpsy ka9qubersdr before 0.1.58 has a stored cross-site scripting XSS vulnerability in the chat message rendering functionality. User-controlled URLs in chat messages were insufficiently neutralized before being converted into HTML links. Quotation characters could break out of the generated hre...

CVE-2026-97723

The madpsy ka9q_ubersdr software, in versions before 0.1.58 , is susceptible to a stored cross-site scripting (XSS) vulnerability within the chat message rendering functionality. The root cause is the insufficient neutralization of user-controlled URLs before they are converted into HTML links. S...

CVE-2026-91121 Discourse: Chat upload filenames rendered as raw HTML in excerpts

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, attacker-controlled upload filenames used in chat message excerpts were rendered as unescaped HTML. A user able to upload a file and send chat content could place markup in a filename that was th...

EUVD-2026-86306

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, attacker-controlled upload filenames used in chat message excerpts were rendered as unescaped HTML. A user able to upload a file and send chat content could place markup in a filename that was th...

CVE-2026-36228

CVE-2026-36228: PoC de Denegación de Servicio en mensajes de chat mtowho de Easy Chat Server 3.1 Este repositorio contiene una prueba de concepto benigna por defecto para CVE-2026-36228, un problema de denegación de servicio en el manejo de mensajes de chat de Easy Chat Server 3.1. Este repositor...

CVE-2026-81825

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, = 20260811 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers t...

CVE-2026-81825

The Simple Ajax Chat WordPress plugin (all versions up to and including 20260811 ) is vulnerable to unauthenticated Stored Cross-Site Scripting via chat messages. The root cause is insufficient input sanitization and output escaping, compounded by a nonce that is publicly visible on the chat page...

CVE-2026-81825 Simple Ajax Chat <= 20260811 - Unauthenticated Stored Cross-Site Scripting

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, = 20260811 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers t...

EUVD-2026-75930

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, = 20260811 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers t...

PT-2026-89759

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, = 20260811 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers t...

CVE-2026-81825: Improper Neutralization of Input During Web Page Generation

The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, = 20260811 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers t...

EUVD-2022-56040

PocketMine-MP before 4.2.10 fails to validate the total length of incoming chat message blobs before splitting them by newline characters, allowing attackers to send large messages containing many newlines. Malicious clients can send megabyte-sized chat packets and bombard the server with thousan...

CVE-2022-51011: Improper Input Validation

PocketMine-MP before 4.2.10 fails to validate the total length of incoming chat message blobs before splitting them by newline characters, allowing attackers to send large messages containing many newlines. Malicious clients can send megabyte-sized chat packets and bombard the server with thousan...

CVE-2026-81807

The Simple Ajax Chat WordPress plugin before 20260827 does not escape chat message content before rendering it, allowing unauthenticated users to inject arbitrary HTML attributes into the page and run scripts in the browser of anyone viewing the chat, including administrators...

EUVD-2026-69859

The Simple Ajax Chat WordPress plugin before 20260827 does not escape chat message content before rendering it, allowing unauthenticated users to inject arbitrary HTML attributes into the page and run scripts in the browser of anyone viewing the chat, including administrators...

CVE-2026-81807 Simple Ajax Chat < 20260827 - Unauthenticated Stored XSS via Chat Message Linkification

The Simple Ajax Chat WordPress plugin before 20260827 does not escape chat message content before rendering it, allowing unauthenticated users to inject arbitrary HTML attributes into the page and run scripts in the browser of anyone viewing the chat, including administrators...

OESA-2026-2936 thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fixes: A malicious LDAP server, which a Thunderbird user is configured to query for address-book autocomplete, can stash arbitrarily large amounts of attacker-supplied data into the Thunderbird LDAP client until it crashes du...

CVE-2026-54007: Origin Validation Error

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt in an authenticated victim...

Open WebUI: Forged chat-file link allows cross-user file read and deletion

Summary Open WebUI v0.9.5 lets an authenticated user attach arbitrary fileid values to their own chat message without checking whether they own or can read those files. If the attacker then shares that chat and grants themselves read access, hasaccesstofile treats the victim file as accessible...

CVE-2026-44786: Exposure of Sensitive Information to an Unauthorized Actor

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...