CVE-2020-29565

Name: CVE-2020-29565
Creator: NVD / NIST
Published: 2020-12-04T08:15:11.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.40%

Last modified Jun 17, 2026

CVE-2020-29565 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

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.

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

1.40%

69.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Openstack	Horizon	>= 15.3.0, < 15.3.2
Openstack	Horizon	>= 16.0.0, < 16.2.1
Openstack	Horizon	>= 17.0.0, < 18.3.3
Openstack	Horizon	>= 18.4.0, <= 18.5.0
Debian	Debian Linux	10.0

References

http://www.openwall.com/lists/oss-security/2020/12/08/2Mailing List, Patch, Third Party Advisory
https://bugs.launchpad.net/horizon/+bug/1865026Exploit, Issue Tracking, Third Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758841/Patch, Third Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758843/Patch, Third Party Advisory
https://security.openstack.org/ossa/OSSA-2020-008.htmlPatch, Vendor Advisory
https://www.debian.org/security/2020/dsa-4820Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/08/2Mailing List, Patch, Third Party Advisory
https://bugs.launchpad.net/horizon/+bug/1865026Exploit, Issue Tracking, Third Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758841/Patch, Third Party Advisory
https://review.opendev.org/c/openstack/horizon/+/758843/Patch, Third Party Advisory
https://security.openstack.org/ossa/OSSA-2020-008.htmlPatch, Vendor Advisory
https://www.debian.org/security/2020/dsa-4820Third Party Advisory

Timeline

Published: Dec 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-29565?

How severe is CVE-2020-29565?

CVE-2020-29565 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2020-29565?

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-2020-29565?

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

Scan your code now

Source: NVD / NIST