Moodle: duplicating a bigbluebutton activity assigns the same meeting id
Priority LOW 16CWE-284Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00251 16th percentileScored 2026-11-07
Fix Fixed moodle: 4.2.3, 4.1.6, 4.0.11
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | moodle | 4.2.0 to before 4.2.3; 4.1.0 to before 4.1.6; 4.0.0 to before 4.0.11 | 4.2.3, 4.1.6, 4.0.11 | Patch available | CNA |
- moodle Vendor— Affected 4.2.0 to before 4.2.3; 4.1.0 to before 4.1.6; 4.0.0 to before 4.0.11 Fixed in 4.2.3, 4.1.6, 4.0.11 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* | 4.0.0 to before 4.0.11; 4.1.0 to before 4.1.6; 4.2.0 to before 4.2.3 | Vulnerable | Moodle |
| cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
- cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.0.11; 4.1.0 to before 4.1.6; 4.2.0 to before 4.2.3 Vulnerable ·Moodle
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA moodle Fixed in 4.2.3, 4.1.6, 4.0.11
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-5543
- 2026-10-03 Alias added: GHSA-p657-7739-2grh
References
Sources
- CVE-2023-5543 · CVE Program
- CVE-2023-5543 · NVD
- FIRST EPSS
- GHSA-p657-7739-2grh · GitHub Advisory Database · CC BY 4.0
- CVE-2023-5543 · Red Hat security data · CC BY 4.0
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