CVE-2025-61602— BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId
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I. Basic Information for CVE-2025-61602
Vulnerability Information
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Vulnerability Title
BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 `chatSendMessageReaction`. Version 3.0.13 contains a patch. No known workarounds are available.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对异常条件检查或处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
BigBlueButton 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 3.0.13之前版本存在安全漏洞，该漏洞源于发送畸形的reactionEmojiId，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bigbluebutton | bigbluebutton | < 3.0.13 | - |
II. Public POCs for CVE-2025-61602
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · bigbluebutton · 2025-10-09 · 3 CVEs total
| CVE-2025-61601 | 7.5 HIGH | BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation |
| CVE-2025-55200 | 7.1 HIGH | BigBlueButton vulnerable to Stored XSS via name of user at Shared Notes |
IV. Related Vulnerabilities
Same product: bigbluebutton
- CVE-2026-41127
BigBlueButton's missing authorization allows viewer to injec - CVE-2026-41126
BigBlueButton has Open Redirect through bigbluebutton/api/jo - CVE-2026-27736
BigBlueButton has Open Redirect vulnerability in ApiControll - CVE-2026-27467
BigBlueButton: Audio from participants to the server initial - CVE-2026-27466
BigBlueButton: Exposed ClamAV port enables Denial of Service
Same vendor: bigbluebutton
- CVE-2026-41127
BigBlueButton's missing authorization allows viewer to injec - CVE-2026-41126
BigBlueButton has Open Redirect through bigbluebutton/api/jo - CVE-2026-27736
BigBlueButton has Open Redirect vulnerability in ApiControll - CVE-2026-27467
BigBlueButton: Audio from participants to the server initial - CVE-2026-27466
BigBlueButton: Exposed ClamAV port enables Denial of Service
Same weakness: CWE-703
- CVE-2026-34388
Fleet vulnerable to Denial of Service via unhandled gRPC log - CVE-2025-59787
HTTP 5XX Internal Server Errors - CVE-2026-28407
malcontent's nested archive extraction failure can drop cont - CVE-2026-1996
Certain HP OfficeJet Pro Printers – Denial of Service - CVE-2025-68135
EVerest's inadequate exception handling leads to denial of s
V. Comments for CVE-2025-61602
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