CVE-2021-28168

Eclipse Jersey 2.28 to 2.33 and Eclipse Jersey 3.0.0 to 3.0.1 contains a local information disclosure vulnerability. This is due to the use of the File.createTempFile which creates a file inside of the system temporary directory with the permissions: -rw-r--r--. Thus the contents of this file are viewable by all other users locally on the system. As such, if the contents written is security sensitive, it can be disclosed to other local users.

Published: 2021-04-22 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-28168 is rated Moderate Risk (44.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.91%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-28168

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.16% 0.91% +0.75%
2 2026-03-04 0.05% 0.16% +0.11%
3 2026-03-01 — 0.05% —

Full EPSS history (47 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-28168

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.2 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.5 3.6 [email protected]
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2021-28168

GitHub Security Advisory for CVE-2021-28168

GHSA-c43q-5hpj-4crv · Severity: medium · Ecosystem: maven — Local information disclosure via system temporary directory

OS Trackers for CVE-2021-28168

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2021-28168
ubuntu medium CVE-2021-28168 medium priority: Ubuntu including 1 source packages (jersey1), 7 status rows across 7 suites (bionic, focal, groovy, hirsute, trusty, upstream, xenial): not-affected 5, DNE 1, released 1. https://ubuntu.com/security/CVE-2021-28168

Affected software / configurations for CVE-2021-28168

Vendor Product Version Raw CPE
eclipse jersey >= 2.28, < 2.34 cpe:2.3:a:eclipse:jersey:*:*:*:*:*:*:*:*
eclipse jersey >= 3.0.0, < 3.0.2 cpe:2.3:a:eclipse:jersey:*:*:*:*:*:*:*:*
oracle communications_cloud_native_core_policy 1.15.0 cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.15.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_unified_data_repository 1.15.0 cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:1.15.0:*:*:*:*:*:*:*

References for CVE-2021-28168

URL Tags
https://github.com/eclipse-ee4j/jersey/pull/4712 Patch Third Party Advisory
https://github.com/eclipse-ee4j/jersey/security/advisories/GHSA-c43q-5hpj-4crv Third Party Advisory
https://lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3E
https://lists.apache.org/thread.html/r280438f7cb4b3b1c9dfda9d7b05fa2a5cfab68618c6afee8169ecdaa%40%3Ccommits.kafka.apache.org%3E
https://lists.apache.org/thread.html/r305fb82e5c005143c1e2ec986a19c0a44f42189ab2580344dc955359%40%3Cdev.kafka.apache.org%3E
https://lists.apache.org/thread.html/r4066176a7352e021d7a81af460044bde8d57f40e98f8e4a31923af3a%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r42fef440487a04cf5e487a9707ef5119d2dd5b809919f25ef4296fc4%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r454f38e85db149869c5a92c993c402260a4f8599bf283f6cfaada972%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/r6dadc8fe82071aba841d673ffadf34728bff4357796b1990a66e3af1%40%3Ccommits.kafka.apache.org%3E
https://lists.apache.org/thread.html/r96658b899fcdbf04947257d201dc5a0abdbb5fb0a8f4ec0a6c15e70f%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/ra2722171d569370a9e15147d9f3f6138ad9a188ee879c0156aa2d73a%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/ra3290fe51b4546fac195724c4187c4cb7fc5809bc596c2f7e97606f4%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/ra3d7cd37fc794981a885332af2f8df0d873753380ea19935d6d847fc%40%3Cdev.kafka.apache.org%3E
https://lists.apache.org/thread.html/rafc3c4cee534f478cbf8acf91e48373e291a21151f030e8132662a7b%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/rc288874c330b3af9e29a1a114c5e0d24fff7a79eaa341f551535c8c0%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/rc6221670de35b819fe191e7d8f2d17bc000549bd554020cec644b71e%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/rd54b42edccc1b993853a9c4943a9b16db763f5e2febf6e64b7d0fe3c%40%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/rdff6939e6c8dd620e20b013d9a35f57d42b3cd19e1d0483d85dfa2fd%40%3Cjira.kafka.apache.org%3E
https://www.oracle.com/security-alerts/cpuapr2022.html Third Party Advisory
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