Skip to main content

Fix XSS vulnerabilities in Java sources

org.openrewrite.analysis.java.security.FixXssVulnerabilityJava

Wraps tainted arguments flowing into HTML output sinks with an HTML-escape helper. Reuses FindXssVulnerability's taint spec so the fix's source/sink/sanitizer coverage stays in sync with the detector. The escape helper is picked per JavaProject based on which dependency is declared (direct or transitive) in the project's Maven or Gradle build, preferring Spring HtmlUtils (org.springframework:spring-web), then OWASP Encode (org.owasp.encoder:encoder), then Commons Text (org.apache.commons:commons-text), then deprecated Commons Lang3 (org.apache.commons:commons-lang3). Projects with no recognised helper dependency are skipped; arguments already wrapped in a recognised sanitizer are also skipped. For detection without remediation, use FindXssVulnerability directly.

Recipe source​

This recipe is only available to users of Moderne.

This recipe is available under the Moderne Proprietary License.

Example​

Before​
import javax.servlet.http.HttpServletRequest;
import java.io.PrintWriter;

public class GreetingController {
    public void greet(HttpServletRequest request, PrintWriter out) {
        String name = request.getParameter("name");
        out.println("<h1>Hello " + name + "</h1>");
    }
}
After​
import org.springframework.web.util.HtmlUtils;

import javax.servlet.http.HttpServletRequest;
import java.io.PrintWriter;

public class GreetingController {
    public void greet(HttpServletRequest request, PrintWriter out) {
        String name = request.getParameter("name");
        out.println(HtmlUtils.htmlEscape("<h1>Hello " + name + "</h1>"));
    }
}
Unchanged​
demo

Usage​

This recipe has no required configuration options. Users of Moderne can run it via the Moderne CLI.

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell
mod run . --recipe FixXssVulnerabilityJava

If the recipe is not available locally, then you can install it using:

mod config recipes jar install io.moderne.recipe:rewrite-program-analysis:0.12.8

See how this recipe works across multiple open-source repositories​

Run this recipe on OSS repos at scale with the Moderne SaaS.

The community edition of the Moderne platform enables you to easily run recipes across thousands of open-source repositories.

Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.

Data Tables​

Source files that had results​

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column NameDescription
Source path before the runThe source path of the file before the run. null when a source file was created during the run.
Source path after the runA recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changesIn a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changesThe specific recipe that made a change.
Estimated time savingAn estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
CycleThe recipe cycle in which the change was made.