Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U H N N 5.5 .0103 63.0 —
AFFECTED Product Versions Fixed Apache Groovy 2.0 to 2.4.20 – —
TIMELINE Aug 12 Reserved by apache Dec 7 Published (CNA: apache) Oct 8 ENRICHED — CVE-2020-17521 (Apache Software Foundation Apache Groovy). Received CVSS 5.5 and CPE data from NVD.
Apache Groovy provides extension methods to aid with creating temporary directories. Prior to this fix, Groovy's implementation of those extension methods was using a now superseded Java JDK method call that is potentially not secure on some operating systems in some contexts. Users not using the extension methods mentioned in the advisory are not affected, but may wish to read the advisory for further details. Versions Affected: 2.0 to 2.4.20, 2.5.0 to 2.5.13, 3.0.0 to 3.0.6, and 4.0.0-alpha-1. Fixed in versions 2.4.21, 2.5.14, 3.0.7, 4.0.0-alpha-2.
| Date | Event | Detail |
|---|---|---|
| August 12, 2020 | Reserved | Reserved by apache |
| December 7, 2020 | Published | Published (CNA: apache) |
| October 8, 2026 | ENRICHED | ENRICHED — CVE-2020-17521 (Apache Software Foundation Apache Groovy). Received CVSS 5.5 and CPE data from NVD. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Apache Software Foundation | Apache Groovy | — | 2.0 to 2.4.20 | — |
Authoritative record: CVE-2020-17521 at cve.org
Vendors: apache
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-17521 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
