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CVE-2019-20479

A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs...

6.1 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

1.89%Up 0.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.1

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.

Record
CVE-2019-20479
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0
5.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:N
Weakness
CWE-601
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-20479
Updated
2026-11-02
EUVDEUVD-2019-11023 No score

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.

Record
EUVD-2019-11023
Updated
2026-11-03
GitHub AdvisoriesGHSA-5fmg-x3vm-cm8v 6.1

A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs...

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.

Record
GHSA-5fmg-x3vm-cm8v
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-601
Updated
2026-11-02
OSV 6.1

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.

Record
CVE-2019-20479
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2019-20479 6.1

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.

Record
DEBIAN-CVE-2019-20479
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
Show 9 moreShow less
OSVRHSA-2020:3032 6.1

Red Hat Security Advisory: mod_auth_openidc:2.3 security and bug fix update

Record
RHSA-2020:3032
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVRHSA-2020:3970 5.8

Red Hat Security Advisory: mod_auth_openidc security update

Record
RHSA-2020:3970
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
OSVRLSA-2020:3032 6.1

Moderate: mod_auth_openidc:2.3 security and bug fix update

The mod_auth_openidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server.

Security Fix(es):

  • mod_auth_openidc: Open redirect in logout url when using URLs with leading slashes (CVE-2019-14857)

  • mod_auth_openidc: Open redirect issue exists in URLs with slash and backslash (CVE-2019-20479)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

  • Module stream mod_auth_openidc:2.3 does not have correct module.md file (BZ#1844107)
Record
RLSA-2020:3032
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVALSA-2020:3032 No score

Moderate: mod_auth_openidc:2.3 security and bug fix update

The mod_auth_openidc is an OpenID Connect authentication module for Apache HTTP Server. It enables an Apache HTTP Server to operate as an OpenID Connect Relying Party and/or OAuth 2.0 Resource Server.

Security Fix(es):

  • mod_auth_openidc: Open redirect in logout url when using URLs with leading slashes (CVE-2019-14857)

  • mod_auth_openidc: Open redirect issue exists in URLs with slash and backslash (CVE-2019-20479)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

  • Module stream mod_auth_openidc:2.3 does not have correct module.md file (BZ#1844107)
Record
ALSA-2020:3032
Updated
2026-11-02
OSVMGASA-2020-0129 No score

Updated apache-mod_auth_openidc packages fix security vulnerability

The updated package fixes a security vulnerability:

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. (CVE-2019-20479)

Record
MGASA-2020-0129
Updated
2026-11-02
OSVopenSUSE-SU-2020:0376-1 No score

Security update for apache2-mod_auth_openidc

This update for apache2-mod_auth_openidc fixes the following issues:

  • CVE-2019-20479: Fixed an open redirect issue in URLs with slash and backslash (bsc#1164459).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Record
openSUSE-SU-2020:0376-1
Updated
2026-11-02
OSVSUSE-SU-2020:0705-1 No score

Security update for apache2-mod_auth_openidc

This update for apache2-mod_auth_openidc fixes the following issues:

  • CVE-2019-20479: Fixed an open redirect issue in URLs with slash and backslash (bsc#1164459).
Record
SUSE-SU-2020:0705-1
Updated
2026-11-02
OSVSUSE-SU-2020:0706-1 No score

Security update for apache2-mod_auth_openidc

This update for apache2-mod_auth_openidc fixes the following issues:

  • CVE-2019-20479: Fixed an open redirect issue in URLs with slash and backslash (bsc#1164459).
Record
SUSE-SU-2020:0706-1
Updated
2026-11-02
OSVSUSE-SU-2025:4532-1 No score

Security update for apache2-mod_auth_openidc

This update for apache2-mod_auth_openidc fixes the following issues:

  • Update to 2.4.17.1 (bsc#1248806 / PED-14130).
  • Remove many patches, as they've been merged upstream.
Record
SUSE-SU-2025:4532-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
cjose
AlmaLinux:8
 before 0.6.1-2.module_el8.6.0+2868+44838709
0.6.1-2.module_el8.6.0+2868+44838709
cjose-devel
AlmaLinux:8
 before 0.6.1-2.module_el8.6.0+2868+44838709
0.6.1-2.module_el8.6.0+2868+44838709
libapache2-mod-auth-openidc
Debian:12
 before 2.4.1-1
2.4.1-1
libapache2-mod-auth-openidc
Debian:13
 before 2.4.1-1
2.4.1-1
libapache2-mod-auth-openidc
Debian:14
 before 2.4.1-1
2.4.1-1
libapache2-mod-auth-openidc
Debian:8
 before 1.6.0-1+deb8u3, plus listed versions
1.6.0-11.6.0-1+deb8u11.6.0-1+deb8u2
1.6.0-1+deb8u3
libapache2-mod-auth-openidc
Debian:9
 before 2.1.6-1+deb9u1, plus listed versions
2.1.6-1
2.1.6-1+deb9u1
libapache2-mod-auth-openidc
Debian:10
 before 2.3.10.2-1+deb10u2, plus listed versions
2.3.10.2-12.3.10.2-1+deb10u1
2.3.10.2-1+deb10u2
apache-mod_auth_openidc
Mageia:7
 before 2.3.2-2.2.mga7
2.3.2-2.2.mga7
cjose
Red Hat:enterprise_linux:8::appstream
 before 0:0.6.1-2.module+el8+2454+f890a43a
0:0.6.1-2.module+el8+2454+f890a43a
Show 20 moreShow less
Affected packages
PackageAffectedFixed
cjose-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 0:0.6.1-2.module+el8+2454+f890a43a
0:0.6.1-2.module+el8+2454+f890a43a
cjose-debugsource
Red Hat:enterprise_linux:8::appstream
 before 0:0.6.1-2.module+el8+2454+f890a43a
0:0.6.1-2.module+el8+2454+f890a43a
cjose-devel
Red Hat:enterprise_linux:8::appstream
 before 0:0.6.1-2.module+el8+2454+f890a43a
0:0.6.1-2.module+el8+2454+f890a43a
mod_auth_openidc
Red Hat:enterprise_linux:8::appstream
 before 0:2.3.7-4.module+el8.2.0+6919+ac02cfd2.3
0:2.3.7-4.module+el8.2.0+6919+ac02cfd2.3
mod_auth_openidc-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 0:2.3.7-4.module+el8.2.0+6919+ac02cfd2.3
0:2.3.7-4.module+el8.2.0+6919+ac02cfd2.3
mod_auth_openidc-debugsource
Red Hat:enterprise_linux:8::appstream
 before 0:2.3.7-4.module+el8.2.0+6919+ac02cfd2.3
0:2.3.7-4.module+el8.2.0+6919+ac02cfd2.3
mod_auth_openidc
Red Hat:enterprise_linux:7::server
 before 0:1.8.8-7.el7
0:1.8.8-7.el7
mod_auth_openidc-debuginfo
Red Hat:enterprise_linux:7::server
 before 0:1.8.8-7.el7
0:1.8.8-7.el7
mod_auth_openidc
Red Hat:enterprise_linux:7::workstation
 before 0:1.8.8-7.el7
0:1.8.8-7.el7
mod_auth_openidc-debuginfo
Red Hat:enterprise_linux:7::workstation
 before 0:1.8.8-7.el7
0:1.8.8-7.el7
cjose
Rocky Linux:8
 before 0:0.6.1-2.module+el8.3.0+129+2feafa46
0:0.6.1-2.module+el8.3.0+129+2feafa46
apache2-mod_auth_openidc
SUSE:Linux Enterprise Module for Server Applications 15 SP1
 before 2.3.8-3.7.1
2.3.8-3.7.1
apache2-mod_auth_openidc
SUSE:Linux Enterprise Server 12 SP4
 before 2.4.0-3.11.1
2.4.0-3.11.1
apache2-mod_auth_openidc
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
 before 2.4.0-3.11.1
2.4.0-3.11.1
apache2-mod_auth_openidc
SUSE:Linux Enterprise Server 12 SP5
 before 2.4.0-3.11.1
2.4.0-3.11.1
apache2-mod_auth_openidc
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
 before 2.4.0-3.11.1
2.4.0-3.11.1
apache2-mod_auth_openidc
SUSE:Linux Enterprise Module for Server Applications 15 SP6
 before 2.4.17.1-150600.16.14.1
2.4.17.1-150600.16.14.1
apache2-mod_auth_openidc
SUSE:Linux Enterprise Module for Server Applications 15 SP7
 before 2.4.17.1-150600.16.14.1
2.4.17.1-150600.16.14.1
apache2-mod_auth_openidc
openSUSE:Leap 15.6
 before 2.4.17.1-150600.16.14.1
2.4.17.1-150600.16.14.1
apache2-mod_auth_openidc
openSUSE:Leap 15.1
 before 2.3.8-lp151.2.6.1
2.3.8-lp151.2.6.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-20479 is a medium vulnerability (CVSS 6.1) in Debian Linux, published February 20, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.89%, the 79th percentile. Fixed in cjose 0.6.1-2.module_el8.6.0+2868+44838709.

References

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