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CVE-2021-21064

21
FAUCET Score

CVE-2021-21064 is a path traversal vulnerability affecting Magento UPWARD-php versions 1.1.4 and earlier, and Magento UPWARD Connector versions 1.1.2 and earlier. An authenticated attacker with admin console access can exploit an upload feature to upload a malicious YAML file, potentially allowing them to read arbitrary files from the remote server. The vulnerability has a CVSS score of 4.9 (Medium), indicating a network-based attack with low complexity, requiring high privileges, and resulting in high confidentiality impact. There is no impact on integrity or availability. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. The CVE has received minimal community discussion and media coverage, suggesting low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.2CPE matchmatch criteria
cpe:2.3:a:magento:upward_connector:*:*:*:*:*:*:*:*
<= 1.1.4CPE matchmatch criteria
cpe:2.3:a:magento:upward_php:*:*:*:*:*:*:*:*
<= 1.1.4CPE match
cpe:2.3:a:adobe:magento_commerce:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.9MEDIUM

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.51%
Probability of exploitation in next 30 days
EPSS Percentile
94.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0851 is in the 99th percentile among its peer group of 3,562 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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