CVE-2021-21331 | DataDog API Client contains a Local Information Disclosure Vulnerability

The Java client for the Datadog API before version 1.0.0-beta.9 has a local information disclosure of sensitive information downloaded via the API using the API Client. The Datadog API is executed on a unix-like system with multiple users. The API is used to download a file containing sensitive information. This sensitive information is exposed locally to other users. This vulnerability exists in the API Client for version 1 and 2. The method `prepareDownloadFilecreates` creates a temporary file with the permissions bits of `-rw-r--r--` on unix-like systems. On unix-like systems, the system temporary directory is shared between users. As such, the contents of the file downloaded via the `downloadFileFromResponse` method will be visible to all other users on the local system. Analysis of the finding determined that the affected code was unused, meaning that the exploitation likelihood is low. The unused code has been removed, effectively mitigating this issue. This issue has been patched in version 1.0.0-beta.9. As a workaround one may specify `java.io.tmpdir` when starting the JVM with the flag `-Djava.io.tmpdir`, specifying a path to a directory with `drw-------` permissions owned by `dd-agent`.

Published: 2021-03-03 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-21331 is rated Low Risk (23/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.12%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2021-21331

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 2026-03-03 0.20% 0.12% -0.08%
2 2025-11-21 0.14% 0.20% +0.07%
3 2025-11-18 — 0.14% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-21331

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.0 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.3 1.4 [email protected]
3.3 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 1.4 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-21331

GitHub Security Advisory for CVE-2021-21331

GHSA-2cxf-6567-7pp6 · Severity: low · Ecosystem: maven — Local Information Disclosure Vulnerability

Affected software / configurations for CVE-2021-21331

Vendor Product Version Raw CPE
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta1:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta2:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta3:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta4:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta5:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta6:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta7:*:*:*:*:*:*
datadoghq datadog-api-client-java 1.0.0 cpe:2.3:a:datadoghq:datadog-api-client-java:1.0.0:beta8:*:*:*:*:*:*

References for CVE-2021-21331

cvelogic Threat Intelligence