# Cassandra vulnerabilities > Cassandra is made by Apache. We track 11 published vulnerabilities in it, across 235 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 12 May 2023. If you run Cassandra, check your version against the exploited flaws below and patch those first. Canonical page: https://www.precursorintelligence.com/product/apache/cassandra ## At a glance - **Made by:** [Apache](https://www.precursorintelligence.com/vendors/apache) - **Published vulnerabilities:** 11 - **Known to be exploited:** 1 - **Versions tracked:** 235 - **Most recently added to the known-exploited list:** [CVE-2016-3427](https://www.precursorintelligence.com/what-is/cve-2016-3427), 12 May 2023. We keep watching the list. ## Which versions of Cassandra do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "2.1.0 to before 2.1.22" means from 2.1.0 up to, but not including, 2.1.22. - [CVE-2016-3427](https://www.precursorintelligence.com/what-is/cve-2016-3427) (Oracle Java SE and JRockit Unspecified Vulnerability): 2.1.0 to before 2.1.22, 2.2.0 to before 2.2.18, 3.0.0 to before 3.0.22, 3.11.0 to before 3.11.8, 4.0.0-beta1 ## Which Cassandra vulnerabilities are being exploited? 1 flaw is on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2016-3427](https://www.precursorintelligence.com/what-is/cve-2016-3427): Oracle Java SE and JRockit Unspecified Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 92%, known exploited since 12 May 2023. ## Which Cassandra flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2021-44521](https://www.precursorintelligence.com/what-is/cve-2021-44521): 58%, Critical (CVSS 9.1) - [CVE-2019-2684](https://www.precursorintelligence.com/what-is/cve-2019-2684): 38%, Medium (CVSS 5.9) - [CVE-2016-4970](https://www.precursorintelligence.com/what-is/cve-2016-4970): 11%, High (CVSS 7.5) - [CVE-2015-0225](https://www.precursorintelligence.com/what-is/cve-2015-0225): 6.6%, High (CVSS 7.5) - [CVE-2020-13946](https://www.precursorintelligence.com/what-is/cve-2020-13946): 3.0%, Medium (CVSS 5.9) - [CVE-2018-8016](https://www.precursorintelligence.com/what-is/cve-2018-8016): 2.3%, Critical (CVSS 9.8) - [CVE-2020-17516](https://www.precursorintelligence.com/what-is/cve-2020-17516): 1.9%, High (CVSS 7.5) - [CVE-2025-24860](https://www.precursorintelligence.com/what-is/cve-2025-24860): 1.1%, Medium (CVSS 5.4) - [CVE-2025-26467](https://www.precursorintelligence.com/what-is/cve-2025-26467): 0.5%, High (CVSS 8.8) ## Questions ### How many vulnerabilities does Cassandra have? We track 11 published vulnerabilities listed under the name Cassandra, across 235 versions. The most recent Cassandra flaw added to the known-exploited list is CVE-2016-3427, on 12 May 2023. ### Which Cassandra vulnerabilities are being exploited? 1 is on the list of flaws known to be exploited. The most recently added is CVE-2016-3427. ### Which versions of Cassandra do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2016-3427, affects 2.1.0 to before 2.1.22, 2.2.0 to before 2.2.18, 3.0.0 to before 3.0.22, 3.11.0 to before 3.11.8 and more. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Cassandra? Create a Precursor Intelligence account and track Cassandra. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Cassandra? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact