CVE-2020-13946
No exploitation reported by the sources we read.
- Published2020-09-01
- Fixed in4.0-beta2 · 3.11.8 · 3.0.22 · 2.2.18 · 2.1.22 · 2.1.12
- WeaknessCWE-668
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
In Apache Cassandra, all versions prior to 2.1.22, 2.2.18, 3.0.22, 3.11.8 and 4.0-beta2, it is possible for a local attacker without access to the Apache Cassandra process or configuration files to manipulate the RMI registry to perform a man-in-the-middle attack and capture user names and passwords used to access the JMX interface. The attacker can then use these credentials to access the JMX interface and perform unauthorised operations. Users should also be aware of CVE-2019-2684, a JRE vulnerability that enables this issue to be exploited remotely.
Timeline
dates in UTC- 2020-09-0121:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-13946?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-13946?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV · NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.0 | ≥ 4.0-beta1, < 4.0-beta2 | 4.0-beta2 | OSV |
| 3.11 | ≥ 3.11.0, < 3.11.8 | 3.11.8 | NVD · OSV |
| 3.0 | ≥ 3.0.0, < 3.0.22 | 3.0.22 | NVD · OSV |
| 2.2 | ≥ 2.2.0, < 2.2.18 | 2.2.18 | NVD · OSV |
| 2.1 | < 2.1.22 | 2.1.22 | NVD · OSV |
| 2.1 | ≥ 2.1.0, < 2.1.12 | 2.1.12 | OSV |
| 4.0 | = 4.0.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Apache cassandra to 4.0-beta2 · 3.11.8 · 3.0.22 · 2.2.18 · 2.1.22 · 2.1.12
Advisories and patches
- lists.apache.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.15.9read 2026-10-23
- NVDCVSS 2.04.3read 2026-10-23
- NVDweakness (CWE)CWE-668read 2026-10-23
- FIRST EPSSEPSS score3.0 %2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2020-09-01
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-13946?
Is CVE-2020-13946 actively exploited?
What is the CVSS score for CVE-2020-13946?
Running cassandra? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.