Description Preview
A vulnerability has been identified in Vaadin Flow server component that affects versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1) and 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8). The issue exists in the development mode handler where improper URL encoding allows a local user to execute arbitrary JavaScript code by opening a specially crafted URL in a browser. This vulnerability could potentially lead to client-side attacks when development mode is enabled.
Overview
The vulnerability (CVE-2021-33604) affects the development mode handler in the com.vaadin:flow-server component. When in development mode, the application fails to properly encode URLs, which can be exploited by a local user to inject and execute arbitrary JavaScript code. This vulnerability is particularly concerning in development environments where multiple developers may have access to the application. An attacker could craft a malicious URL that, when opened in a browser, executes JavaScript code in the context of the application, potentially leading to information disclosure or other client-side attacks.
Remediation
Users should upgrade to patched versions of Vaadin:
- For Vaadin 14.x: Upgrade to version 14.6.2 or later
- For Vaadin 15.x through 19.x: Upgrade to version 19.0.9 or later
If immediate upgrading is not possible, consider the following mitigation:
- Disable development mode in production environments
- Limit access to development instances to trusted users only
- Be cautious when opening URLs from untrusted sources in development environments
References
- Official Vaadin security advisory: https://vaadin.com/security/cve-2021-33604
- Patch information: https://github.com/vaadin/flow/pull/11099
- Affected versions:
- com.vaadin:flow-server versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1)
- com.vaadin:flow-server versions 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8)
Industry ExposureMost to leastThis section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
- Accommodation & Food ServicesAccommodation & Food Services
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting
- Arts, Entertainment & RecreationArts, Entertainment & Recreation
- ConstructionConstruction
- Educational ServicesEducational Services
- Finance and InsuranceFinance and Insurance
- Health Care & Social AssistanceHealth Care & Social Assistance
- InformationInformation
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- ManufacturingManufacturing
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Retail TradeRetail Trade
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
