CVE-2023-5543

Name: CVE-2023-5543
Creator: NVD / NIST
Published: 2023-11-09T22:15:11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2023-5543 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. 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.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.3/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.24%

15.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Moodle	Moodle	>= 4.0.0, < 4.0.11
Moodle	Moodle	>= 4.1.0, < 4.1.6
Moodle	Moodle	>= 4.2.0, < 4.2.3
Fedoraproject	Extra Packages For Enterprise Linux	7.0
Fedoraproject	Fedora	38

References

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-77795Patch
https://bugzilla.redhat.com/show_bug.cgi?id=2243442Issue Tracking, Patch, Third Party Advisory
https://moodle.org/mod/forum/discuss.php?d=451584Patch, Vendor Advisory
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-77795Patch
https://bugzilla.redhat.com/show_bug.cgi?id=2243442Issue Tracking, Patch, Third Party Advisory
https://moodle.org/mod/forum/discuss.php?d=451584Patch, Vendor Advisory

Timeline

Published: Nov 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5543?

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.

How severe is CVE-2023-5543?

CVE-2023-5543 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5543?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5543?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST