No exploitation reportedFix available

CVE-2021-20841

Q: Is CVE-2021-20841 actively exploited?

Active exploitation of CVE-2021-20841 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-20841?

CVE-2021-20841 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

No exploitation reported by the sources we read.

Published2021-11-24
Fixed in2.17.2

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Improper access control in Management screen of EC-CUBE 2 series 2.11.2 to 2.17.1 allows a remote authenticated attacker to bypass access restriction and to alter System settings via unspecified vectors.

Timeline

dates in UTC

2021-11-2416:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-20841?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-20841?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD

ec-cube/ec-cube

Branch	Affected	Fixed in	Source
2.x	≥ 2.11.2, < 2.17.2	2.17.2	OSV

Ec-cube

Branch	Affected	Fixed in	Source
2.x	≥ 2.11.2, ≤ 2.17.1	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update ec-cube/ec-cube to 2.17.2

Advisories and patches

www.ec-cube.netPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.16.5read 2026-10-23
NVDCVSS 2.04read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Published: 2021-11-24
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-20841?

Is CVE-2021-20841 actively exploited?

Active exploitation of CVE-2021-20841 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-20841?

CVE-2021-20841 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

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