PT-2022-17901 · Bigbluebutton · Bigbluebutton Greenlight

Published 2022-06-02 · Updated 2023-05-04 · CVE-2022-26497

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions BigBlueButton Greenlight version 2.11.1

Description The issue allows for XSS, where a threat actor could have a username containing a JavaScript payload. This payload gets executed in the browser of the victim in the "Share room access" dialog if the victim has shared access to the particular room with the attacker previously.

Recommendations For BigBlueButton Greenlight version 2.11.1, consider restricting the use of special characters in usernames to minimize the risk of exploitation. As a temporary workaround, avoid using the "Share room access" dialog until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2022-26497

Affected Products

Bigbluebutton Greenlight

References · 7

• 🔥 https://github.com/bigbluebutton/greenlight/blob/master/app/assets/javascripts/room.js#L352 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-26497 · Security Note
• https://osv.dev/vulnerability/CVE-2022-26497 · Vendor Advisory
• https://mgm-sp.com/en/cve-2022-26497-bigbluebutton-greenlight-xss · Patch
• http://packetstormsecurity.com/files/172143/Shannon-Baseband-acfg-pcfg-SDP-Attribute-Memory-Corruption.html · Note
• https://t.me/cvenotify/49809 · Telegram Post
• https://t.me/cibsecurity/43753 · Telegram Post