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Vulnerability record · CVE-2019-20479 · published 20 February 2020

CVE-2019-20479: Mod auth openidc open redirect vulnerability

Openidc · Mod Auth Openidc

A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a slash and backslash at the beginning.

6.1 CVSS 3.1 Medium EPSS 1.9% · top 21.1% CWE-601 · Open redirect
6.1CVSS 3.1 base score, v2 5.8
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a slash and backslash at the beginning.

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00036.html Mailing ListThird Party Advisory
https://github.com/zmartzone/mod_auth_openidc/commit/02431c0adfa30f478cf2eb20ed6ea51fdf446be7 Patch
https://github.com/zmartzone/mod_auth_openidc/pull/453 PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/02/msg00035.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00028.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27XJYAEONKJDESNE7WVZF5D
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGXONXPWTX7DV62TIUIUVOZ
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00036.html Mailing ListThird Party Advisory
https://github.com/zmartzone/mod_auth_openidc/commit/02431c0adfa30f478cf2eb20ed6ea51fdf446be7 Patch
https://github.com/zmartzone/mod_auth_openidc/pull/453 PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/02/msg00035.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00028.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27XJYAEONKJDESNE7WVZF5D
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGXONXPWTX7DV62TIUIUVOZ

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Source: NIST National Vulnerability Database (record CVE-2019-20479), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.