BigBlueButton up to 3.0.28 presentationpod RemovePresentationPubMsgHdlr.scala presentationId privileges management

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.44

Summaryinfo

A vulnerability classified as problematic was found in BigBlueButton up to 3.0.28. Impacted is an unknown function of the file akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/presentationpod/RemovePresentationPubMsgHdlr.scala of the component presentationpod. Executing a manipulation of the argument presentationId can lead to privileges management. The identification of this vulnerability is CVE-2026-55489. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in BigBlueButton up to 3.0.28. This vulnerability affects an unknown function of the file akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/presentationpod/RemovePresentationPubMsgHdlr.scala of the component presentationpod. The manipulation of the argument presentationId with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect integrity, and availability. CVE summarizes:

BigBlueButton is an open-source virtual classroom. Prior to 3.0.29, BigBlueButton presenters could submit a presentationId through /api/graphql that identified a presentation belonging to another meeting. akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/presentationpod/RemovePresentationPubMsgHdlr.scala did not verify the presentation's meeting identifier before deletion, allowing a presenter who knew the identifier to delete another meeting's presentation and disrupt its availability. This issue is fixed in version 3.0.29.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-55489 since 06/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 3.0.29 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-2026-99036714). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.9
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: BigBlueButton 3.0.29

Timelineinfo

06/17/2026 CVE reserved
08/20/2026 +64 days Advisory disclosed
08/20/2026 +0 days VulDB entry created
08/22/2026 +2 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-55489 (🔒)
GCVE (CVE): GCVE-0-2026-55489
GCVE (VulDB): GCVE-100-393904
CNNVD: CNNVD-2026-99036714 - BigBlueButton 授权问题漏洞

Entryinfo

Created: 08/20/2026 23:58
Updated: 08/22/2026 17:00
Changes: 08/20/2026 23:58 (65), 08/21/2026 18:37 (6), 08/22/2026 17:00 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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