How severe is CVE-2021-20735?

CVE-2021-20735 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-20735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20735?

CVE-2021-20735 primarily affects Ec-cube Delivery Slip Number. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-20735?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20735 published?

CVE-2021-20735 was published on 2021-06-22 and last updated on 2026-06-17.

CVE-2021-20735

CVE-2021-20735 is a medium-severity vulnerability in Ec-cube Delivery Slip Number with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ec-cube Delivery Slip Number
Published: 2021-06-22
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-20735?: 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.
How severe is CVE-2021-20735?: CVE-2021-20735 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-20735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20735?: CVE-2021-20735 primarily affects Ec-cube Delivery Slip Number. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-20735?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20735 published?: CVE-2021-20735 was published on 2021-06-22 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ec-cube:delivery_slip_number:*:*:*:*:*:ec-cube:*:*
cpe:2.3:a:ec-cube:delivery_slip_number_csv_bulk_registration:*:*:*:*:*:ec-cube:*:*
cpe:2.3:a:ec-cube:delivery_slip_number_mail:*:*:*:*:*:ec-cube:*:*

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