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Vulnerability record · CVE-2021-20718 · published 20 May 2021

CVE-2021-20718: Mod auth openidc uncontrolled resource consumption vulnerability

Openidc · Mod Auth Openidc

mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.

7.5 CVSS 3.1 High EPSS 3.4% · top 11.6% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score, v2 5.0
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/zmartzone/mod_auth_openidc ProductThird Party Advisory
https://jvn.jp/en/jp/JVN49704918/index.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FV4KYMQWPS3I2QPW2C253ML
https://www.oracle.com/security-alerts/cpujan2022.html Third Party Advisory
https://www.zmartzone.eu/ Vendor Advisory
https://github.com/zmartzone/mod_auth_openidc ProductThird Party Advisory
https://jvn.jp/en/jp/JVN49704918/index.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FV4KYMQWPS3I2QPW2C253ML
https://www.oracle.com/security-alerts/cpujan2022.html Third Party Advisory
https://www.zmartzone.eu/ Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-20718), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.