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CVE-2021-33561: A stored cross-site scripting (XSS) vulnerability in Shopizer before 2.17.0 allows remote attackers to inje...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Shopizer versions before 2.17.0 can store attacker-supplied script or HTML in a customer name field. When administrators view affected customer data, the script can run in the administration interface. This can turn a customer record into a persistent browser-side risk for store staff.

Executive priority

Prioritize remediation for internet-facing stores or stores with high-value administrator accounts. The issue is not listed in KEV, but stored XSS inside an admin console can support account abuse or data exposure if an administrator views malicious records.

Technical view

CVE-2021-33561 is a stored XSS issue in Shopizer before 2.17.0. The CVE description identifies customer_name in store administration forms as the stored input, with execution when backend data is fetched, including admin/customers/list.html. Public references include a Shopizer fix commit, a 2.16.0-to-2.17.0 comparison, and an Exploit-DB entry.

Likely exposure

Exposure is limited to deployments running Shopizer before 2.17.0 where untrusted users can influence customer_name data that administrators later view. The provided source bundle does not identify specific CPEs, hosted services, or distribution packages.

Exploitation context

A public Exploit-DB reference exists, but the source bundle does not show CISA KEV listing or confirmed active exploitation. Treat this as publicly documented and reproducible risk, not as proven in-the-wild exploitation.

Researcher notes

The CVE metadata lacks CVSS, CWE, and normalized affected CPE data. Analysis should therefore stay anchored to Shopizer before 2.17.0 and the named customer_name storage path. Do not infer broader Shopizer components without validating against the referenced commit or release diff.

Mitigation direction

  • Upgrade Shopizer to 2.17.0 or later.
  • Review the referenced Shopizer fix commit and release comparison.
  • Restrict store administration access while remediation is pending.
  • Remove or neutralize unexpected HTML from stored customer_name values.
  • Check current Shopizer vendor guidance for any later security updates.

Validation and detection

  • Inventory Shopizer deployments and confirm their running version.
  • Identify any instances older than Shopizer 2.17.0.
  • Review customer_name records for unexpected HTML or script markup.
  • Confirm administrative customer listing pages encode stored names safely.
  • Verify remediation in a non-production environment before broad rollout.
Prepared
Confidence
medium
Sources
5

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Database behavior lookup

The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-33561 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
4Source 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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