EUVD-2025-36362

PILOS Platform for Interactive Live-Online Seminars is a frontend for BigBlueButton. PILOS before 4.8.0 exposes the PHP version via the X-Powered-By header, enabling attackers to fingerprint the server and assess potential exploits. This information disclosure vulnerability originates from PHP’s...

CVE-2025-62781: Insufficient Session Expiration

PILOS Platform for Interactive Live-Online Seminars is a frontend for BigBlueButton. Prior to 4.8.0, users with a local account can change their password while logged in. When doing so, all other active sessions are terminated, except for the currently active one. However, the current session’s...

CVE-2025-61601

BigBlueButton is an open-source virtual classroom. A Denial of Service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to freeze or crash the entire server by abusing the polling feature's Choices response type. By submitting a malicious payload with a massive array in...

CVE-2025-61602

BigBlueButton is an open-source virtual classroom. A denial-of-service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed reactionEmojiId in the GraphQL mutation...

CVE-2025-55200

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.13, the "Shared Notes" feature contains a Stored Cross-Site Scripting XSS vulnerability with the input location being the "Username" field and the output location on the "Shared Notes" page, when a user with a malicious...

CVE-2025-61602

BigBlueButton is an open-source virtual classroom. A denial-of-service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed reactionEmojiId in the GraphQL mutation...

CVE-2025-61601

BigBlueButton is an open-source virtual classroom. A Denial of Service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to freeze or crash the entire server by abusing the polling feature's Choices response type. By submitting a malicious payload with a massive array in...

CVE-2025-61602 BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId

BigBlueButton is an open-source virtual classroom. A denial-of-service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed reactionEmojiId in the GraphQL mutation...

CVE-2025-61602 BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId

BigBlueButton is an open-source virtual classroom. A denial-of-service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed reactionEmojiId in the GraphQL mutation...

EUVD-2025-33560

BigBlueButton is an open-source virtual classroom. A denial-of-service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed reactionEmojiId in the GraphQL mutation...

CVE-2025-61602

BigBlueButton (open-source virtual classroom) has a DoS vulnerability in chat that allows an authenticated user to crash the chat for all participants by sending a malformed reactionEmojiId via the GraphQL mutation chatSendMessageReaction in versions prior to 3.0.13. Version 3.0.13 contains a pat...

CVE-2025-61602 BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId

BigBlueButton is an open-source virtual classroom. A denial-of-service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed reactionEmojiId in the GraphQL mutation...

CVE-2025-61601 BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation

BigBlueButton is an open-source virtual classroom. A Denial of Service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to freeze or crash the entire server by abusing the polling feature's Choices response type. By submitting a malicious payload with a massive array in...

CVE-2025-61601

BigBlueButton has a DoS vulnerability (CVE-2025-61601) in versions prior to 3.0.13. The issue stems from mishandling the polling feature’s Choices response: sending a malicious payload with a massive answerIds array can freeze or crash the current meeting and potentially affect the server. A patc...

CVE-2025-61601 BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation

BigBlueButton is an open-source virtual classroom. A Denial of Service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to freeze or crash the entire server by abusing the polling feature's Choices response type. By submitting a malicious payload with a massive array in...

EUVD-2025-33564

BigBlueButton is an open-source virtual classroom. A Denial of Service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to freeze or crash the entire server by abusing the polling feature's Choices response type. By submitting a malicious payload with a massive array in...

CVE-2025-61601 BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation

BigBlueButton is an open-source virtual classroom. A Denial of Service DoS vulnerability in versions prior to 3.0.13 allows any authenticated user to freeze or crash the entire server by abusing the polling feature's Choices response type. By submitting a malicious payload with a massive array in...

CVE-2025-55200

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.13, the "Shared Notes" feature contains a Stored Cross-Site Scripting XSS vulnerability with the input location being the "Username" field and the output location on the "Shared Notes" page, when a user with a malicious...

CVE-2025-55200

BigBlueButton has a Stored XSS vulnerability in the Shared Notes feature prior to version 3.0.13. The issue arises from unsafely handling the Username field, allowing a low-privilege user to inject arbitrary JavaScript that can execute in the context of higher-privileged users (e.g., Admins) who ...

CVE-2025-55200 BigBlueButton vulnerable to Stored XSS via name of user at Shared Notes

BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.13, the "Shared Notes" feature contains a Stored Cross-Site Scripting XSS vulnerability with the input location being the "Username" field and the output location on the "Shared Notes" page, when a user with a malicious...