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CVE-2022-31065— Cross site scripting vulnerability for private chat in bigbluebutton

Quick assessment

Affected
bigbluebutton bigbluebutton
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 2.4.8 之前版本和 2.5.0 之前版本存在跨站脚本漏洞，该漏洞源于启用私人聊天的会议中的用户容易受到恶意 JavaScript 攻击。

CVSS 6.5 · Medium EPSS 0.77% · P54
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I. Basic Information for CVE-2022-31065

Vulnerability Information
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Vulnerability Title
Cross site scripting vulnerability for private chat in bigbluebutton
Source: CVE Program / CVE List V5
Vulnerability Description
BigBlueButton is an open source web conferencing system. In affected versions an attacker can embed malicious JS in their username and have it executed on the victim's client. When a user receives a private chat from the attacker (whose username contains malicious JavaScript), the script gets executed. Additionally when the victim receives a notification that the attacker has left the session. This issue has been patched in version 2.4.8 and 2.5.0. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
BigBlueButton 跨站脚本漏洞
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 2.4.8 之前版本和 2.5.0 之前版本存在跨站脚本漏洞，该漏洞源于启用私人聊天的会议中的用户容易受到恶意 JavaScript 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 < 2.4.8 -

II. Public POCs for CVE-2022-31065

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III. Intelligence Information for CVE-2022-31065

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Patches & Fixes for CVE-2022-31065 (2)

Vendor Advisories for CVE-2022-31065 (1)

Same Patch Batch · bigbluebutton · 2022-06-27 · 3 CVEs total

CVE-2022-31064 6.5 MEDIUM Cross site scripting in username that will trigger by sending chat
CVE-2022-31039 4.3 MEDIUM Improper privilege management - Anyone can view room settings in GreenLight

IV. Related Vulnerabilities

Same product: bigbluebutton
Same vendor: bigbluebutton
Same weakness: CWE-79

V. Comments for CVE-2022-31065

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