HOMEVULNERABILITIESCVE-2021-23331
LOW

CVE-2021-23331

NVD-CWE-noinfoPublished: February 3, 2021· Updated: Jun 17, 2026

3.3
CVSS v3.1

Official Description

This affects all versions of package com.squareup:connect. 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 by downloadFileFromResponse will be visible to all other users on the local system. A workaround fix for this issue is to set the system property java.io.tmpdir to a safe directory as remediation. Note: This version of the SDK is end of life and no longer maintained, please upgrade to the latest version.

NVD Source

Technical Analysis

CVE-2021-23331 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

squareup1 product(s)
connect java software development kit
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://snyk.io/vuln/SNYK-JAVA-COMSQUAREUP-1065988
ADVISORYhttps://snyk.io/vuln/SNYK-JAVA-COMSQUAREUP-1065988

All References (4)

→
https://github.com/square/connect-java-sdk/blob/master/src/main/java/com/squareup/connect/ApiClient.java%23L613Broken Link
→
https://snyk.io/vuln/SNYK-JAVA-COMSQUAREUP-1065988Third Party Advisory
→
https://github.com/square/connect-java-sdk/blob/master/src/main/java/com/squareup/connect/ApiClient.java%23L613Broken Link
→
https://snyk.io/vuln/SNYK-JAVA-COMSQUAREUP-1065988Third Party Advisory

Quick Facts

CVE IDCVE-2021-23331
CVSS Score3.3 / 10
SeverityLOW
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 3, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2022-21389
10.0
CVE-2022-32845
10.0
CVE-2022-21275
10.0
CVE-2020-1467
10.0
CVE-2022-21390
10.0
CVE-2023-38586
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-23331 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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