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CVE-2023-5543

Moodle: duplicating a bigbluebutton activity assigns the same meeting id

LOW
3.3
CVSS Score
Published: November 9, 2023 at 09:35 PM UTC
Updated: June 17, 2026 at 06:48 AM UTC
3 products affected across 2 vendorsFedoraMoodleExtra Packages for Enterprise Linux

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Severity
LOW3.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

When duplicating a BigBlueButton activity, the original meeting ID was also duplicated instead of using a new ID for the new activity. This could provide unintended access to the original meeting.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Extra Packages for Enterprise Linux· Fedora Projectrpm
95%
7.0
Fedora· Fedora Projectrpm
95%
38
Moodle· Moodle
95%
4.0.0 ≤ v < 4.0.114.1.0 ≤ v < 4.1.64.2.0 ≤ v < 4.2.3
Affected range stops below 4.0.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Patch
Source: [email protected]
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-77795
Issue Trackingx_refsource_REDHATPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2243442
PatchVendor Advisory
Source: [email protected]
https://moodle.org/mod/forum/discuss.php?d=451584

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.3LOWfedora
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-284NVD-CWE-noinfo

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