CVE-2023-43797— BigBlueButton Stored Cross-site Scripting vulnerability at Guest Lobby
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I. Basic Information for CVE-2023-43797
Vulnerability Information
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Vulnerability Title
BigBlueButton Stored Cross-site Scripting vulnerability at Guest Lobby
Source: NVD (National Vulnerability Database)
Vulnerability Description
BigBlueButton is an open-source virtual classroom. Prior to versions 2.6.11 and 2.7.0-beta.3, Guest Lobby was vulnerable to cross-site scripting when users wait to enter the meeting due to inserting unsanitized messages to the element using unsafe innerHTML. Text sanitizing was added for lobby messages starting in versions 2.6.11 and 2.7.0-beta.3. There are no known workarounds.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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 2.6.11之前版本，2.7.0-beta.3之前版本存在跨站脚本漏洞，该漏洞源于Guest Lobby存在跨站脚本（XSS）漏洞。
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 | < 2.6.11 | - |
II. Public POCs for CVE-2023-43797
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/bigbluebutton/bigbluebutton/pull/18392x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2023-43797
Same Patch Batch · bigbluebutton · 2023-10-30 · 4 CVEs total
| CVE-2023-43798 | 5.6 MEDIUM | BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass) |
| CVE-2023-42803 | 5.3 MEDIUM | BigBlueButton Unrestricted File Upload vulnerability |
| CVE-2023-42804 | 3.1 LOW | BigBlueButton Path Traversal – Reading Certain File Extensions |
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-79
- CVE-2026-8262
Devs Palace ERP Online chart-save cross site scripting - CVE-2026-8256
Devs Palace ERP Online mr-save cross site scripting - CVE-2026-8255
Devs Palace ERP Online add_new_customer cross site scripting - CVE-2026-8254
Devs Palace ERP Online sales_save cross site scripting - CVE-2026-8253
Devs Palace ERP Online purchase_save cross site scripting
V. Comments for CVE-2023-43797
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