Resource exhaustion in BigBlueButton - CVE-2025-61602
Published: October 10, 2025
Vulnerability identifier: #VU116903
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-61602
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation for the "reactionEmojiId" parameter when reacting to messages. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
BigBlueButton
How to mitigate CVE-2025-61602
Install updates from vendor's website.
BigBlueButton - update to 3.0.13