CVE-2019-25027 Reflected cross-site scripting in default RouteNotFoundError view in Vaadin 10 and 11-13
Attackers can execute malicious JavaScript via crafted URLs due to missing output sanitization in the default RouteNotFoundError view of Vaadin flow-server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-25027?
CVE-2019-25027 is a medium-severity cross-site scripting vulnerability in Vaadin, published on 23 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Missing output sanitization in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.10 (Vaadin 10.0.0 through 10.0.13), and 1.1.0 through 1.4.2 (Vaadin 11.0.0 through 13.0.5) allows attacker to execute malicious JavaScript via crafted URL
Which versions are affected by CVE-2019-25027?
4 open source packages ship an affected version, including com.vaadin:flow-server. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
com.vaadin:flow-server Maven | From 1.0.0 | 1.0.11 |
com.vaadin:flow-server Maven | From 1.0.0 | 1.0.11 |
com.vaadin:flow-server Maven | From 1.1.0 | 1.4.3 |
com.vaadin:flow-server Maven | From 1.1.0 | 1.4.3 |
Products include Vaadin Flow, Vaadin Vaadin.
How do I fix CVE-2019-25027?
Upgrade com.vaadin:flow-server to a fixed version for your release line: 1.0.11 or 1.4.3.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2019-25027 being exploited?
There is no known exploitation of CVE-2019-25027 in the wild and no public exploit code.
Other vulnerabilities in Vaadin
- CVE-2021-31407 Server classes and resources exposure in OSGi applications using Vaadin 12-14 and 19
- CVE-2021-31405 Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-17
- CVE-2021-31411 Insecure temporary directory usage in frontend build functionality of Vaadin 14 and 15-19
- CVE-2021-31408 Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19
- CVE-2020-36321 Directory traversal in development mode handler in Vaadin 14 and 15-17
Sources
Also known as GHSA-rp4x-wxqv-cf9m.