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Vulnerability record · CVE-2020-29565 · published 4 December 2020

CVE-2020-29565: Openstack horizon open redirect vulnerability

Openstack · Horizon

An issue was discovered in OpenStack Horizon before 15.3.2, 16.x before 16.2.1, 17.x and 18.x before 18.3.3, 18.4.x, and 18.5.x. There is a lack of validation of the "next" parameter, which would allow someone to supply a malicious URL in Horizon that can cause an automatic redirect to the provided malicious URL.

6.1 CVSS 3.1 Medium EPSS 1.4% · top 26.7% CWE-601 · Open redirect
6.1CVSS 3.1 base score, v2 5.8
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in OpenStack Horizon before 15.3.2, 16.x before 16.2.1, 17.x and 18.x before 18.3.3, 18.4.x, and 18.5.x. There is a lack of validation of the "next" parameter, which would allow someone to supply a malicious URL in Horizon that can cause an automatic redirect to the provided malicious URL.

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

Affected products

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2020/12/08/2 Mailing ListPatchThird Party Advisory
https://bugs.launchpad.net/horizon/+bug/1865026 ExploitIssue TrackingThird Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758841/ PatchThird Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758843/ PatchThird Party Advisory
https://security.openstack.org/ossa/OSSA-2020-008.html PatchVendor Advisory
https://www.debian.org/security/2020/dsa-4820 Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/08/2 Mailing ListPatchThird Party Advisory
https://bugs.launchpad.net/horizon/+bug/1865026 ExploitIssue TrackingThird Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758841/ PatchThird Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758843/ PatchThird Party Advisory
https://security.openstack.org/ossa/OSSA-2020-008.html PatchVendor Advisory
https://www.debian.org/security/2020/dsa-4820 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-29565), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.