CVE-2020-29565

Exp

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.

Published: 2020-12-04 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-29565 is rated High Exploit Risk (64.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.40%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-29565

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-29565

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.71% 1.40% +0.69%
2 2025-11-21 0.83% 0.71% -0.12%
3 2025-11-18 — 0.83% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-29565

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2020-29565

GitHub Security Advisory for CVE-2020-29565

GHSA-f8fh-xp28-q59m · Severity: medium · Ecosystem: pip — OpenStack Horizon Open redirect in workflow forms

OS Trackers for CVE-2020-29565

vendor priority summary link
debian not yet assigned CVE-2020-29565 not yet assigned priority: Debian including 1 source packages (horizon), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-29565
redhat medium — https://access.redhat.com/security/cve/CVE-2020-29565
suse medium — https://www.suse.com/security/cve/CVE-2020-29565/
ubuntu medium CVE-2020-29565 medium priority: Ubuntu including 2 source packages (horizon, openstack), 12 status rows across 6 suites (bionic, focal, groovy, trusty, upstream, xenial): DNE 5, released 3, needs-triage 2, not-affected 2. https://ubuntu.com/security/CVE-2020-29565

Affected software / configurations for CVE-2020-29565

Vendor Product Version Raw CPE
openstack horizon >= 15.3.0, < 15.3.2 cpe:2.3:a:openstack:horizon:*:*:*:*:*:*:*:*
openstack horizon >= 16.0.0, < 16.2.1 cpe:2.3:a:openstack:horizon:*:*:*:*:*:*:*:*
openstack horizon >= 17.0.0, < 18.3.3 cpe:2.3:a:openstack:horizon:*:*:*:*:*:*:*:*
openstack horizon >= 18.4.0, <= 18.5.0 cpe:2.3:a:openstack:horizon:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2020-29565

cvelogic Threat Intelligence