CVE-2021-27576
Apache OpenMeetings: bandwidth can be overloaded with public web service
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
- Record
CVE-2021-27576- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
Apache OpenMeetings: bandwidth can be overloaded with public web service
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
- Record
CVE-2021-27576- Updated
- 2026-11-02
EUVDEUVD-2021-1375
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
- Record
EUVD-2021-1375- CVSS
- 0.0 None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-px9f-597f-wmcf
Uncontrolled Resource Consumption in Apache OpenMeetings server
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
- Record
GHSA-px9f-597f-wmcf- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
- Record
CVE-2021-27576- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-px9f-597f-wmcf
Uncontrolled Resource Consumption in Apache OpenMeetings server
If was found that the NetTest web service can be used to overload the bandwidth of a Apache OpenMeetings server. This issue was addressed in Apache OpenMeetings 6.0.0
- Record
GHSA-px9f-597f-wmcf- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.openmeetings:openmeetings-parentMaven |
4.0.0 up to 6.0.0 | 6.0.0 |
org.apache.openmeetings:openmeetings-parentMaven |
4.0.0 up to 6.0.0, plus listed versions 4.0.14.0.104.0.114.0.34.0.4 Show 10 moreShow less4.0.54.0.64.0.74.0.95.0.05.0.0-M15.0.0-M25.0.0-M35.0.0-M45.1.0 |
6.0.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27576 is a high vulnerability (CVSS 7.5) in Apache Openmeetings, published March 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.84%, the 86th percentile. Fixed in org.apache.openmeetings:openmeetings-parent 6.0.0.
References
lists.apache.org/thread.html/r9bb615bd70a0197368f5f3ffc887162686caeb0b5fc30592a7a871e9%40%3Cuser.openmeetings.apache.org%3E
nvd.nist.gov/vuln/detail/CVE-2021-27576
github.com/apache/openmeetings/commit/060a3114ad759931aeb42cd9afa9d1ebb39d3075
issues.apache.org/jira/browse/OPENMEETINGS-2551
openmeetings.apache.org/security.html