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CVE-2021-21427

23
FAUCET Score

CVE-2021-21427 is a high-severity vulnerability affecting Magento-lts versions prior to 19.4.13 and 20.0.9, allowing an authenticated administrator to gain unauthorized access to restricted resources. With a CVSS score of 7.2, this vulnerability presents a high risk due to its network-based attack vector, low attack complexity, and potential for high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 19.4.13CPE matchmatch criteria
cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:*
>= 20.0.0, < 20.0.9CPE matchmatch criteria
cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.3
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.07%
Probability of exploitation in next 30 days
EPSS Percentile
61.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0107 is in the 50th percentile among its peer group of 5,538 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 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

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: openmage/magento-ltsFixed in: 19.4.13
composerpatch availablevia ghsa
Product: openmage/magento-ltsFixed in: 20.0.9

Vendor Advisories (1)

composerGHSA-fvrf-9428-527mcritical

Backport for CVE-2021-21024 Blind SQLi from Magento 2

Apr 22, 2021

References

github.com / OpenMage/magento-lts/security/advisories/GHSA-fvrf-9428-527m
Third Party Advisory