CVE-2023-43797

mediumpriority · track · 22EPSS 0.004 · 36 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.42% (36th) EPSS

CVSS 5.4 · medium

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 2.8 · impact 3.4

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79US

affected products (7)

Products and version ranges known to be affected.

Open Source BigBlueButton < 2.6.0-beta.1all versionscert_bundDEcpe:/a:bigbluebutton:bigbluebutton:2.6.0-beta.1
Open Source BigBlueButton < 2.6.0-beta.2all versionscert_bundDEcpe:/a:bigbluebutton:bigbluebutton:2.6.0-beta.2
Open Source BigBlueButton < 2.6.11all versionscert_bundDEcpe:/a:bigbluebutton:bigbluebutton:2.6.11
bigbluebutton bigbluebutton≤ < 2.6.11enisa_euvdEU
bigbluebutton bigbluebutton2.7.0-alpha.1, → 2.7.0-beta.3enisa_euvdEU
bigbluebutton bigbluebutton< 2.6.11nvdUScpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*
bigbluebutton bigbluebutton= 2.7.0nvdUScpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2777BigBlueButton: Mehrere SchwachstellenDeutsch2023-10-30csaf · cert_bundDE
Ein entfernter authentifizierter Angreifer kann mehrere Schwachstellen in BigBlueButton ausnutzen, um beliebigen Code auszuführen, vertrauliche Informationen offenzulegen oder Dateien zu manipulieren.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-10-30modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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