CVE Intelligence
Medium

CVE-2020-17521 — Apache Groovy provides extension methods to aid with creating temporary directories…

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.

Published Dec 7, 2020 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: apache

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 1% (30-day exploitation probability)+9
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
1.03%
ahead of 63% of scored CVEs · Oct 15, 2026
Affects
Apache Software Foundation
Atlas and 20 more
CVSS base
5.5
Medium · 1 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Apache Software Foundation Atlas, Apache Software Foundation Groovy, Netapp Snapcenter…).
  2. Apply the fixed version or the patch documented under Remediation.
  3. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Apache Software Foundation Atlas version 2.1.0 Vulnerable NIST National Vulnerability Database
Apache Software Foundation Groovy version 4.0.0-alpha-1version 3.0.0 to 3.0.6version 2.5.0 to 2.5.13version 2.0 to 2.4.20 Vulnerable CVE Program (cve.org) e CISA ADP
Apache Software Foundation Groovy version 4.0.0-alpha1≥ 3.0.0 and ≤ 3.0.6≥ 2.5.0 and ≤ 2.5.13≥ 2.0.0 and ≤ 2.4.20 Vulnerable NIST National Vulnerability Database
Netapp Snapcenter versions not specified by the source Vulnerable NIST National Vulnerability Database
Oracle Agile Engineering Data Management version 6.2.1.0 Vulnerable NIST National Vulnerability Database
Oracle Agile Plm Mcad Connector version 3.6version 3.4 Vulnerable NIST National Vulnerability Database
Oracle Agile Product Lifecycle Management version 9.3.6version 9.3.3 Vulnerable NIST National Vulnerability Database
Oracle Business Process Management Suite version 12.2.1.4.0version 12.2.1.3.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Brm - Elastic Charging Engine version 11.3.0.9.0version 12.0.0.3 Vulnerable NIST National Vulnerability Database
Oracle Communications Diameter Signaling Router version 8.4.0.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Evolved Communications Application Server version 7.1 Vulnerable NIST National Vulnerability Database
Oracle Communications Services Gatekeeper version 6.0version 6.1version 7.0 Vulnerable NIST National Vulnerability Database
Oracle Healthcare Data Repository version 7.0.2 Vulnerable NIST National Vulnerability Database
Oracle Hospitality Opera 5 version 5.6 Vulnerable NIST National Vulnerability Database
Oracle Ilearning version 6.3version 6.2 Vulnerable NIST National Vulnerability Database
Oracle Insurance Policy Administration ≥ 11.0 and ≤ 11.3.1 Vulnerable NIST National Vulnerability Database
Oracle Jd Edwards Enterpriseone Orchestrator version 9.2.6.0 Vulnerable NIST National Vulnerability Database
Oracle Primavera Gateway ≥ 17.12.0 and ≤ 17.12.10 Vulnerable NIST National Vulnerability Database
Oracle Primavera Unifier version 18.8≥ 17.7 and ≤ 17.12version 16.1version 20.12version 19.12version 16.2 Vulnerable NIST National Vulnerability Database
Oracle Retail Bulk Data Integration version 16.0.3.0version 15.0.3.0 Vulnerable NIST National Vulnerability Database
Oracle Retail Merchandising System version 16.0.3 Vulnerable NIST National Vulnerability Database
Oracle Retail Store Inventory Management version 14.1.3.10version 15.0.3.5version 16.0.3.5 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
5.5 CVSS 3.1 Medium 1.8 3.6 nvd@nist.gov via NIST National Vulnerability Database
2.1 CVSS 2.0 Low 3.9 2.9 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N (score shown at the top: nvd@nist.gov)

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 1.03%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · apache software foundation/apache groovy
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 5.5
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • 2020
  • CVE published
    Dec 7, 2020 · apache

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

12 on the record

Elsewhere on this site

Apache Software Foundation
every CVE for this vendor

Related CVEs (same products)

  • CVE-2026-87266 Improper Access Control in Oracle Agile Product Lifecycle Management Sep 15, 2026
  • CVE-2026-87259 Improper Access Control in Oracle Agile Engineering Data Management Sep 15, 2026
  • CVE-2026-87253 Improper Access Control in Oracle Agile Product Lifecycle Management Sep 15, 2026
  • CVE-2026-87262 Improper Access Control in Oracle Agile Engineering Data Management Sep 15, 2026
  • CVE-2026-87261 Improper Access Control in Oracle Agile Engineering Data Management Sep 15, 2026
  • CVE-2026-87260 Improper Access Control in Oracle Agile Engineering Data Management Sep 15, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No CWE classification.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-17521 is "Apache Groovy provides extension methods to aid with creating temporary directories…", rated Medium. It affects Atlas (Apache Software Foundation); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 1.03% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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