CVE-2021-32645Network attack vector

External-site redirection via untrimmed request URI

Published May 27, 2021 · Updated Aug 3, 2024

Open redirect in tenancy multi-tenant 5.6.0 through 5.7.1 allows remote attackers to redirect users via a crafted request URI. HostnameActions::secure passes the request URI, including leading slashes, directly to the secure redirect builder, allowing a scheme-relative path to select an external host. Exploitation requires default Hostname Identification, a tenant with force_https set to true, and a user who follows the crafted URL; the bounded effect is navigation to an attacker-chosen site.

CVSS severity6.1
Medium
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in tenancy multi-tenant 5.6.0 through 5.7.1 allows remote attackers to redirect users via a crafted request URI. HostnameActions::secure passes the request URI, including leading slashes, directly to the secure redirect builder, allowing a scheme-relative path to select an external host. Exploitation requires default Hostname Identification, a tenant with force_https set to true, and a user who follows the crafted URL; the bounded effect is navigation to an attacker-chosen site.

The record

CVE
CVE-2021-32645
Published
May 27, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3GitHubCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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