CVE-2022-22690Public exploitNetwork attack vector

Account takeover via cached Host header poisoning

Published Jan 18, 2022 · Updated Sep 17, 2024

Host header poisoning in Umbraco CMS before 9.2.0 allows remote attackers to persistently redirect generated application URLs. When UmbracoApplicationUrl is unset, GetApplicationUrlFromCurrentRequest trusts request.Host and EnsureApplicationMainUrl caches the resulting URI. IIS bindings that accept arbitrary hostnames expose the flaw; poisoned password-reset links can send tokens to an attacker-controlled server and enable account takeover.

CVSS severity8.6
High
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Host header poisoning in Umbraco CMS before 9.2.0 allows remote attackers to persistently redirect generated application URLs. When UmbracoApplicationUrl is unset, GetApplicationUrlFromCurrentRequest trusts request.Host and EnsureApplicationMainUrl caches the resulting URI. IIS bindings that accept arbitrary hostnames expose the flaw; poisoned password-reset links can send tokens to an attacker-controlled server and enable account takeover.

The record

CVE
CVE-2022-22690
Published
Jan 18, 2022
Updated
Sep 17, 2024
Vendor
Umbraco
Product
Umbraco CMS
Classifications
CWE-444, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <9.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Umbraco · Umbraco CMSversion=unspecified <9.2.0

Published CVSS scores

8.6AppCheck Ltd.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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