mod_auth_openidc up to 2.4.0 redirect

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in mod_auth_openidc up to 2.4.0 and classified as problematic. This affects an unknown function. The manipulation results in redirect. This vulnerability was named CVE-2019-20479. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in mod_auth_openidc up to 2.4.0. It has been classified as critical. Affected is an unknown code. The manipulation with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was presented 02/20/2020. This vulnerability is traded as CVE-2019-20479. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 276433 (TencentOS Server 3: mod_auth_openidc:2.3 (TSSA-2022:0052)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.4.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (276433) and CERT Bund (WID-SEC-2025-2930). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • SUSE Linux
  • Red Hat Enterprise Linux

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.1
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Redirect
CWE: CWE-601
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 276433
Nessus Name: TencentOS Server 3: mod_auth_openidc:2.3 (TSSA-2022:0052)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mod_auth_openidc 2.4.1
Patch: github.com

Timelineinfo

02/20/2020 🔍
02/20/2020 +0 days 🔍
02/20/2020 +0 days 🔍
01/02/2026 +2143 days 🔍

Sourcesinfo

Advisory: 02431c0adfa30f478cf2eb20ed6ea51fdf446be7
Status: Confirmed

CVE: CVE-2019-20479 (🔍)
GCVE (CVE): GCVE-0-2019-20479
GCVE (VulDB): GCVE-100-150378
CERT Bund: WID-SEC-2025-2930 - Red Hat Enterprise Linux: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Entryinfo

Created: 02/20/2020 17:40
Updated: 01/02/2026 11:55
Changes: 02/20/2020 17:40 (36), 02/20/2020 17:45 (16), 04/02/2024 06:41 (21), 04/02/2024 06:52 (3), 05/11/2025 13:48 (5), 11/21/2025 16:53 (2), 01/02/2026 11:55 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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