How severe is CVE-2021-33561?

CVE-2021-33561 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-33561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33561?

CVE-2021-33561 affects Shopizer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33561?

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

When was CVE-2021-33561 published?

CVE-2021-33561 was published on 2021-05-24 and last updated on 2026-06-17.

CVE-2021-33561

CVE-2021-33561 is a medium-severity vulnerability in Shopizer with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Shopizer
Published: 2021-05-24
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability in Shopizer before 2.17.0 allows remote attackers to inject arbitrary web script or HTML via customer_name in various forms of store administration. It is saved in the database. The code is executed for any user of store administration when information is fetched from the backend, e.g., in admin/customers/list.html.

Frequently asked questions

What is CVE-2021-33561?: A stored cross-site scripting (XSS) vulnerability in Shopizer before 2.17.0 allows remote attackers to inject arbitrary web script or HTML via customer_name in various forms of store administration. It is saved in the database. The code is executed for any user of store administration when information is fetched from the backend, e.g., in admin/customers/list.html.
How severe is CVE-2021-33561?: CVE-2021-33561 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-33561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33561?: CVE-2021-33561 affects Shopizer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33561 published?: CVE-2021-33561 was published on 2021-05-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:shopizer:shopizer:*:*:*:*:*:*:*:*

More vulnerabilities in Shopizer

CVE-2020-11006 — Critical (CVSS 9.1): In Shopizer before version 2.11.0, a script can be injected in various forms and saved in the database, then executed…
CVE-2022-23063 — High (CVSS 8.8): In Shopizer versions 2.3.0 to 3.0.1 are vulnerable to Insufficient Session Expiration. When a password has been changed…
CVE-2025-51605 — High (CVSS 8.1): An issue was discovered in Shopizer 3.2.7. The server's CORS implementation reflects the client-supplied Origin header…
CVE-2014-4964 — Medium (CVSS 6.8): Multiple cross-site request forgery (CSRF) vulnerabilities in Shopizer 1.1.5 and earlier allow remote attackers to…
CVE-2014-4963 — Medium (CVSS 6.8): Shopizer 1.1.5 and earlier allows remote attackers to modify the account settings of arbitrary users via the…
CVE-2022-23061 — Medium (CVSS 6.5): In Shopizer versions 2.0 to 2.17.0 a regular admin can permanently delete a superadmin (although this cannot happen…

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