CVE-2021-20718

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

3.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 87.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

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

2021-05-20 01:15Z5 YR AGO

Last updated

2024-08-03 17:53Z2 YR AGO

Reserved

2020-12-17

Assigning CNA

jpcert

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

00744310a3f3c0dabbbbfa8e461fc6b888702fa2a4694a3150a9fade1ce334a7

• www.zmartzone.euhttps://www.zmartzone.eu/x_refsource_MISC
• github.comhttps://github.com/zmartzone/mod_auth_openidcx_refsource_MISC
• jvn.jphttps://jvn.jp/en/jp/JVN49704918/index.htmlx_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-cc85f79f63https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FV4KYMQWPS3I2QPW2C253MLIAFGBZPLK/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-46b017b771https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24MSDPBXHJU/vendor-advisoryx_refsource_FEDORA
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC