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HIGH severity

CVE-2020-13951 — openmeetings-parent

HIGH

CVE-2020-13951 is a high-severity (CVSS 7.5) vulnerability in org.apache.openmeetings:openmeetings-parent. 1 public exploit reference exists, so weaponization risk is real. A fix is available for org.apache.openmeetings:openmeetings-parent — see the affected versions and patch details below.

Denial of service in Apache OpenMeetings

Also known asGHSA-g37q-26qx-8v2m
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
68.6%probability of exploitation in next 30 days
High Risk0.00%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
67.2%69.7%72.2%74.7%73.3%68.6%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-13951 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
☕org.apache.openmeetings:openmeetings-parent

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Attackers can use public NetTest web service of Apache OpenMeetings 4.0.0-5.0.0 to organize denial of service attack.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.openmeetings:openmeetings-parent≥ 4.0.0&&< 5.1.05.1.0org.apache.openmeetings:openmeetings-parent:5.1.0

Affected Products

1 product · 1 configurations
Application
openmeetingsapache
≥ 4.0.0 && ≤ 5.0.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-49094webappsmultiple

Apache OpenMeetings 5.0.0 - 'hostname' Denial of Service

by SunCSR · Nov 24, 2020

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.openmeetings:openmeetings-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.openmeetings:openmeetings-parent to 5.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-13951 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

Attackers can use public NetTest web service of Apache OpenMeetings 4.0.0-5.0.0 to organize denial of service attack.
O3 Security · Impact-Aware SCA

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CVE-2020-13951: openmeetings DoS — Fixed in 5.1.0