Apache OpenMeetings: bandwidth can be overloaded with public web service
Priority LOW 38CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
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
Why it matters now
EPSS 0.0284 86th percentileScored 2026-11-07
Fix Fixed org.apache.openmeetings:openmeetings-parent (Maven): 6.0.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache OpenMeetings | 4.0.0 and later; Apache OpenMeetings 5 – 5.1.0 | — | No fix listed | CNA |
| — | org.apache.openmeetings:openmeetings-parent (Maven) | 4.0.0 to before 6.0.0 | 6.0.0 | Patch available | GHSA-px9f-597f-wmcf |
- Apache OpenMeetings VendorApache Affected 4.0.0 and later; Apache OpenMeetings 5 – 5.1.0 Fixed in — No fix listed CNA
- org.apache.openmeetings:openmeetings-parent (Maven) Vendor— Affected 4.0.0 to before 6.0.0 Fixed in 6.0.0 Patch available GHSA-px9f-597f-wmcf
Remediation
- Fix · GHSA-px9f-597f-wmcf org.apache.openmeetings:openmeetings-parent (Maven) Fixed in 6.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27576
- 2026-10-03 Alias added: GHSA-px9f-597f-wmcf
References
Advisory 2
Other 5
- https://github.com/apache/openmeetings/commit/060a3114ad759931aeb42cd9afa9d1ebb39d3075
- https://github.com/apache/openmeetings/commit/afe26c950b127776f2dfe920abff41a584874de8
- https://github.com/apache/openmeetings/commit/cbdfd2f9731a8fe3daa9b4adf5da4a063fde161d
- https://issues.apache.org/jira/browse/OPENMEETINGS-2551
- https://openmeetings.apache.org/security.html#cve-2021-27576---apache-openmeetings-bandwidth-can
More Apache Openmeetings vulnerabilities
- TI-2024-36639 Apache OpenMeetings: Deserialisation of untrusted data in cluster mode CVSS 3.1CRITICAL 9.8
- TI-2026-26346 Apache OpenMeetings: Login Credentials Passed via GET Query Parameters CVSS 3.1HIGH 7.5
- TI-2020-10927 Attackers can use public NetTest web service of Apache OpenMeetings 4.0.0-5.0.0 to organize denial of service attack. CVSS 3.1HIGH 7.5
- TI-2016-00702 Directory traversal vulnerability in the Import/Export System Backups functionality in… CVSS 3.0MEDIUM 6.5
- TI-2023-12874 Apache OpenMeetings: allows user impersonation CVSS 3.1CRITICAL 9.8
- TI-2016-07193 Apache OpenMeetings before 3.1.2 is vulnerable to Remote Code Execution via RMI deserialization attack. CVSS 3.0CRITICAL 9.8
Sources
- CVE-2021-27576 · CVE Program
- CVE-2021-27576 · NVD
- FIRST EPSS
- GHSA-px9f-597f-wmcf · GitHub Advisory Database · CC BY 4.0
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