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CVE-2021-20841

23
FAUCET Score

CVE-2021-20841 describes an improper access control vulnerability in EC-CUBE 2 series versions 2.11.2 to 2.17.1. A remote, authenticated attacker can exploit this flaw to bypass access restrictions and modify system settings. Rated Medium severity (CVSS 6.5), this vulnerability requires prior authentication but has low attack complexity, potentially leading to high integrity impact without affecting confidentiality or availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.11.2, <= 2.17.1CPE matchmatch criteria
cpe:2.3:a:ec-cube:ec-cube:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
66.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 81st percentile among its peer group of 21,958 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: ec-cube/ec-cubeFixed in: 2.17.2

Vendor Advisories (1)

composerGHSA-jc55-crg7-pr35medium

EC-CUBE Improper access control in Management screen

Nov 25, 2021

References

jvn.jp / en/jp/JVN75444925/index.html
Third Party Advisory
ec-cube.net / info/weakness/20211111
ExploitPatchVendor Advisory