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GHSA-r2wf-q3x4-hrv9

MediumCVSS 6.1 / 10
Published Jan 27, 2020·Last modified Mar 13, 2026
Affected Components(0)

No affected components available

Description

Versions of Ratpack from 0.9.10 through 1.7.5 are vulnerable to CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (aka. XSS) in the development error handler. An attacker can utilize this to perform XSS when an exception message contains untrusted data.

As a simplistic example:

RatpackServer startedServer = RatpackServer.start(server -> {
    server.handlers(chain -> chain.all(ctx -> {
        // User supplied query parameter
        String message = ctx.getRequest().getQueryParams().get("message");
        // User supplied data appended to the message in an exception
        throw new RuntimeException("An error occurred: " + message);
    }));
});

Impact

  • Cross-Site Scripting

Patches

This vulnerability has been patched in Ratpack version 1.7.6.

Workarounds

If you are unable to update your version of Ratpack, we recommend the following workarounds and mitigations.

  • Ensure that development mode is disabled in production.
  • Don't use real customer data (ie. untrusted user input) in development.

References

For more information

If you have any questions or comments about this advisory:

Risk Scores
Base Score
6.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.

Threat Intelligence
5.6

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2019-10770
    Alias
  • EUVD-2020-0274
    Alias

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Medium severity
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