CVE-2020-17521

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.02% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 63.2% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-12-07 19:22Z5 YR AGO

Last updated

2026-10-08 21:13Z20 DAYS AGO

Reserved

2020-08-12

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

No CWE assigned

Data version

5.2

Document digest

734040084c0f51ab2f90b7f9d435c6ad3edb2f7014b40ca36f5f576b73307819

• groovy-lang.orghttps://groovy-lang.org/security.html#CVE-2020-17521x_refsource_CONFIRM
• lists.apache.org[groovy-notifications] 20201207 [jira] [Closed] (GROOVY-9824) CVE-2020-17521 Apache Groovy Information Disclosurehttps://lists.apache.org/thread.html/ra9dab34bf8625511f23692ad0fcee2725f782e9aad6c5cdff6cf4465%40%3Cnotifications.groovy.apache.org%3Emailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2021.htmlx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20201218-0006/x_refsource_CONFIRM
• lists.apache.org[atlas-dev] 20210422 [jira] [Created] (ATLAS-4257) Atlas - Upgrade groovy to 2.4.21+, 2.5.14+, 3.0.7+, or 4.0.0-alpha-2+ due to CVE-2020-17521https://lists.apache.org/thread.html/rea63a4666ba245d2892471307772a2d8ce0f0741f341d6576625c1b3%40%3Cdev.atlas.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[atlas-dev] 20210422 [jira] [Updated] (ATLAS-4257) Atlas - Upgrade groovy to 2.4.21+, 2.5.14+, 3.0.7+, or 4.0.0-alpha-2+ due to CVE-2020-17521https://lists.apache.org/thread.html/r4b2f13c302eec98838ff7475253091fb9b75bc1038016ba00ebf6c08%40%3Cdev.atlas.apache.org%3Emailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.htmlx_refsource_MISC