CVE-2019-20479

Name: CVE-2019-20479
Creator: NVD / NIST
Published: 2020-02-20T06:15:11.027+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.57%

Last modified Jun 17, 2026

CVE-2019-20479 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.57%

72.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Openidc	Mod Auth Openidc	< 2.4.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00036.htmlMailing List, Third Party Advisory
https://github.com/zmartzone/mod_auth_openidc/commit/02431c0adfa30f478cf2eb20ed6ea51fdf446be7Patch
https://github.com/zmartzone/mod_auth_openidc/pull/453Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/02/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00028.htmlMailing List, Third 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/27XJYAEONKJDESNE7WVZF5D2Z2OBY5JK/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGXONXPWTX7DV62TIUIUVOZF4KQ6SIJE/
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00036.htmlMailing List, Third Party Advisory
https://github.com/zmartzone/mod_auth_openidc/commit/02431c0adfa30f478cf2eb20ed6ea51fdf446be7Patch
https://github.com/zmartzone/mod_auth_openidc/pull/453Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/02/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00028.htmlMailing List, Third 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/27XJYAEONKJDESNE7WVZF5D2Z2OBY5JK/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGXONXPWTX7DV62TIUIUVOZF4KQ6SIJE/

Timeline

Published: Feb 20, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20479?

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.

How severe is CVE-2019-20479?

CVE-2019-20479 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.57% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20479?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20479?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST