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| purl | pkg:maven/org.eclipse.jetty/jetty-servlets@9.4.40 |
| Tags | Ghost |
| Next non-vulnerable version | 9.4.54.v20240208 |
| Latest non-vulnerable version | 11.0.18 |
| Risk | 10.0 |
| Vulnerability | Summary | Fixed by |
|---|---|---|
|
VCID-g3ff-brt6-vkeh
Aliases: CVE-2021-28169 GHSA-gwcr-j4wh-j3cq |
Jetty Utility Servlets ConcatServlet Double Decoding Information Disclosure Vulnerability Requests to the `ConcatServlet` and `WelcomeFilter` are able to access protected resources within the `WEB-INF` directory. For example a request to the `ConcatServlet` with a URI of `/concat?/%2557EB-INF/web.xml` can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application. This occurs because both `ConcatServlet` and `WelcomeFilter` decode the supplied path to verify it is not within the `WEB-INF` or `META-INF` directories. It then uses this decoded path to call `RequestDispatcher` which will also do decoding of the path. This double decoding allows paths with a doubly encoded `WEB-INF` to bypass this security check. ### Impact This affects all versions of `ConcatServlet` and `WelcomeFilter` in versions before 9.4.41, 10.0.3 and 11.0.3. ### Workarounds If you cannot update to the latest version of Jetty, you can instead deploy your own version of the [`ConcatServlet`](https://github.com/eclipse/jetty.project/blob/4204526d2fdad355e233f6bf18a44bfe028ee00b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/ConcatServlet.java) and/or the [`WelcomeFilter`](https://github.com/eclipse/jetty.project/blob/4204526d2fdad355e233f6bf18a44bfe028ee00b/jetty-servlets/src/main/java/org/eclipse/jetty/servlets/WelcomeFilter.java) by using the code from the latest version of Jetty. |
Affected by 0 other vulnerabilities. Affected by 5 other vulnerabilities. Affected by 6 other vulnerabilities. Affected by 6 other vulnerabilities. |
| Vulnerability | Summary | Aliases |
|---|---|---|
| This package is not known to fix vulnerabilities. | ||
| Date | Actor | Action | Vulnerability | Source | VulnerableCode Version |
|---|---|---|---|---|---|
| 2026-04-02T16:57:27.450544+00:00 | GHSA Importer | Affected by | VCID-g3ff-brt6-vkeh | https://github.com/advisories/GHSA-gwcr-j4wh-j3cq | 38.1.0 |