CVE-2021-28163

Jetty vulnerability

CVSS

2.7

EPSS

4.2%

EPSS pct

90th

Exploited

No known

In Eclipse Jetty 9.4.32 to 9.4.38, 10.0.0.beta2 to 10.0.1, and 11.0.0.beta2 to 11.0.1, if a user uses a webapps directory that is a symlink, the contents of the webapps directory is deployed as a static webapp, inadvertently serving the webapps themselves and anything else that might be in that directory.

Affected vendor

Eclipse

Affected product

Jetty

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Weakness type (CWE)

CWE-200 — Exposure of Sensitive Information
CWE-59 — Link Following

Published

2021-04-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring high privileges, no user interaction. Successful exploitation leads to low impact to confidentiality.

Its EPSS score of 4.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2021-28163

Confirm whether Eclipse Jetty is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-28163.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-28163

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-28163 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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