CVE-2021-20751 json
EC-CUBE Cross-site scripting vulnerability
published 2021-06-28 5 y ago modified 2026-06-17 4 mo ago also GHSA-r6qq-qc9m-98w2 , EUVD-2022-5118
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known
Summary
Cross-site scripting vulnerability in EC-CUBE EC-CUBE 4.0.0 to 4.0.5-p1 (EC-CUBE 4 series) allows a remote attacker to inject an arbitrary script by leading an administrator or a user to a specially crafted page and to perform a specific operation.
Patch / fix
- packagist ec-cube/ec-cube 4.0.6
- ec-cube ec-cube 4.0.5
Exploit prediction
1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | ec-cube/ec-cube | >=4.0.0, <4.0.6 |
4.0.6 |
Affected products
- EC-CUBE CO.,LTD. EC-CUBE
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
ec-cube.net
/info/weakness/weakness.php?id=78
web, vendor-advisory
-
jvn.jp
/en/jp/JVN95292458/index.html
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-20751
advisory
-
github.com
/EC-CUBE/ec-cube
package
Sources
- CVE List CVE-2021-20751
- GitHub Advisory GHSA-r6qq-qc9m-98w2
- NVD CVE-2021-20751
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.