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CVE Record

CVE-2021-20735: Cross-site scripting vulnerability in ETUNA EC-CUBE plugins (Delivery slip number plugin (3.0 series) 1.0.1...

Cross-site scripting vulnerability in ETUNA EC-CUBE plugins (Delivery slip number plugin (3.0 series) 1.0.10 and earlier, Delivery slip number csv bulk registration plugin (3.0 series) 1.0.8 and earlier, and Delivery slip number mail plugin (3.0 series) 1.0.8 and earlier) allows remote attackers to inject an arbitrary script by executing a specific operation on the management page of EC-CUBE.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This CVE affects several ETUNA plugins for EC-CUBE. A remote attacker may inject script content through a specific operation on an EC-CUBE management page. Business impact is most relevant where vulnerable plugins are installed and administrative users access the affected management functions.

Executive priority

Treat this as a targeted web-application risk, not a confirmed mass-exploitation emergency. Prioritize affected EC-CUBE stores because management-page script injection can undermine administrator trust and session integrity.

Technical view

CVE-2021-20735 is a cross-site scripting issue in ETUNA EC-CUBE Delivery slip number plugins. Affected versions are Delivery slip number plugin 3.0 series 1.0.10 and earlier, CSV bulk registration 1.0.8 and earlier, and mail plugin 1.0.8 and earlier.

Likely exposure

Exposure is limited to EC-CUBE deployments using the named ETUNA 3.0-series plugins at affected versions. The source indicates the vulnerable operation occurs on the management page, so administrative interface exposure and plugin presence are key scoping factors.

Exploitation context

The provided sources describe remote script injection but do not state active exploitation, public exploit availability, CVSS score, authentication requirements, or a complete attack path. The CVE is not listed as KEV in the bundle.

Researcher notes

The public bundle lacks CVSS, CWE, exploit status, and fixed-version detail. Analysis should stay scoped to the three named ETUNA EC-CUBE plugins and the management-page XSS behavior documented by CVE/JVN references.

Mitigation direction

  • Inventory EC-CUBE sites for the named ETUNA plugins and affected versions.
  • Review EC-CUBE advisories 5087, 5088, and 5089 for vendor guidance.
  • Apply vendor-provided plugin updates or mitigations where available.
  • Limit management page access to trusted administrators while remediation is pending.
  • Review administrative accounts and sessions if suspicious management-page activity is found.

Validation and detection

  • Confirm whether EC-CUBE is deployed in the environment.
  • Check installed ETUNA plugin names and exact versions.
  • Compare versions against the affected ranges in the CVE description.
  • Review management-page logs for unusual administrative activity.
  • Document remediation status for each affected EC-CUBE deployment.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-20735 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
ETUNAETUNA EC-CUBE pluginsDelivery slip number plugin (3.0 series) 1.0.10 and earlier, Delivery slip number csv bulk registration plugin (3.0 series) 1.0.8 and earlier, and Delivery slip number mail plugin (3.0 series) 1.0.8 and earlierListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.