CVE-2022-22690: Umbraco Remote ApplicationURL Overwrite

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-18 · updated 2026-06-17
Weakness: CWE-444

Description

Within the Umbraco CMS, a configuration element named "UmbracoApplicationUrl" (or just "ApplicationUrl") is used whenever application code needs to build a URL pointing back to the site. For example, when a user resets their password and the application builds a password reset URL or when the administrator invites users to the site. For Umbraco versions less than 9.2.0, if the Application URL is not specifically configured, the attacker can manipulate this value and store it persistently affecting all users for components where the "UmbracoApplicationUrl" is used. For example, the attacker is able to change the URL users receive when resetting their password so that it points to the attackers server, when the user follows this link the reset token can be intercepted by the attacker resulting in account takeover.

Affected products

Umbraco-CMS: before 9.2.0 — fixed in 9.2.0

How to fix

Upgrade to a fixed version: Umbraco-CMS 9.2.0. Check the vendor advisory for mitigations.

References

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