HOMEVULNERABILITIESCVE-2021-21064
MEDIUM

CVE-2021-21064

CWE-22Published: February 25, 2021· Updated: Jun 17, 2026

4.9
CVSS v3.1

Official Description

Magento UPWARD-php version 1.1.4 (and earlier) is affected by a Path traversal vulnerability in Magento UPWARD Connector version 1.1.2 (and earlier) due to the upload feature. An attacker could potentially exploit this vulnerability to upload a malicious YAML file that can contain instructions which allows reading arbitrary files from the remote server. Access to the admin console is required for successful exploitation.

NVD Source

Technical Analysis

CVE-2021-21064 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 4.9.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

magento2 product(s)
upward connectorupward php
Source: NVD CPE · 2 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://github.com/magento/upward-php/security
ADVISORYhttps://github.com/magento/upward-php/security/advisories/GHSA-p4pw-hpjx-5685
ADVISORYhttps://github.com/magento/upward-php/security
ADVISORYhttps://github.com/magento/upward-php/security/advisories/GHSA-p4pw-hpjx-5685

All References (4)

→
https://github.com/magento/upward-php/securityThird Party Advisory
→
https://github.com/magento/upward-php/security/advisories/GHSA-p4pw-hpjx-5685Third Party Advisory
→
https://github.com/magento/upward-php/securityThird Party Advisory
→
https://github.com/magento/upward-php/security/advisories/GHSA-p4pw-hpjx-5685Third Party Advisory

Quick Facts

CVE IDCVE-2021-21064
CVSS Score4.9 / 10
SeverityMEDIUM
WeaknessCWE-22
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 25, 2021

Related CVEs (CWE-22)

CVE-2008-4489
10.0
CVE-2010-0284
10.0
CVE-2026-54917
10.0
CVE-2025-54261
10.0
CVE-2009-4000
10.0
CVE-2011-1389
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-21064 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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