CVE-2021-28169 Scanner.
Eclipse Jetty ConcatServlet - Information Disclosure
Free and read-only. Scan only sites you own or are allowed to test.
What This Check Does.
Read-only
It only asks your site for public pages, the way a browser would. Nothing is changed, uploaded or stored.
Up to 2 requests
A small, fixed number of requests, so the check is quick and will not load your site.
Looks for CVE-2021-28169
It looks for the specific sign of this one vulnerability and ends with a clear answer: vulnerable, not vulnerable, or could not be determined.
About CVE-2021-28169. What It Means.
Eclipse Jetty through 9.4.40, through 10.0.2, and through 11.0.2 is susceptible to information disclosure. Requests to the ConcatServlet with a doubly encoded path can access protected resources within the WEB-INF directory, thus enabling an attacker to potentially obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
More CVEs In Eclipse Jetty.
FAQ
Common Questions.
Eclipse Jetty ConcatServlet - Information Disclosure. Eclipse Jetty through 9.4.40, through 10.0.2, and through 11.0.2 is susceptible to information disclosure. Requests to the ConcatServlet with a doubly encoded path can access protected resources within the WEB-INF directory, thus enabling an attacker to potentially obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
Atlas sends up to 2 read-only requests to your site and looks for the specific sign of CVE-2021-28169 in Eclipse Jetty. Nothing is changed, uploaded or stored on your site.
CVE-2021-28169 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing. Its CVSS score is 5.3.
Yes. The check only reads public pages, the same way a browser or a search engine would. Scan only sites you own or are allowed to test.
It means no sign of CVE-2021-28169 was found by this read-only check. It does not prove the site is free of other weaknesses.
Update Eclipse Jetty to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. The vendor links and details are in the CVE-2021-28169 briefing linked on this page.
Scan only sites you own or have written permission to test. A result of Not Vulnerable means this read-only check found no sign of CVE-2021-28169; it is not a guarantee that the site is secure.