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CVE Record

CVE-2021-45227: An issue was discovered in COINS Construction Cloud 11.12.

An issue was discovered in COINS Construction Cloud 11.12. Due to an inappropriate use of HTML IFRAME elements, the file upload functionality is vulnerable to a persistent Cross-Site Scripting (XSS) attack.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

COINS Construction Cloud 11.12 has a reported stored XSS weakness in file uploads. A user who can upload content may be able to cause script-like behavior to persist and later affect other users viewing the uploaded content. The bundle does not provide CVSS, patch status, or active exploitation evidence.

Executive priority

Treat this as a targeted remediation item if COINS Construction Cloud 11.12 is in use, especially where external parties upload files. Business urgency is moderate because stored XSS can affect users, but current evidence lacks CVSS, patch status, and active exploitation confirmation.

Technical view

The CVE describes persistent cross-site scripting caused by inappropriate HTML IFRAME element use in file upload functionality. The named product/version is COINS Construction Cloud 11.12, but structured affected-product metadata is not populated in the bundle. No CWE, CVSS, or vendor fix details are included.

Likely exposure

Exposure is most relevant for organizations using COINS Construction Cloud 11.12 where users can upload files or content that other users later view. Internet-facing or broadly accessible portals increase business risk. Evidence for other versions is not provided in the bundle.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. The issue is a persistent XSS class, so impact depends on who can upload content and which users later view it. No exploit steps or public weaponization evidence are provided here.

Researcher notes

Key gaps are missing CVSS, CWE, populated affected-product data, and explicit remediation details. The CVE description and SySS advisory identify the core issue, but version scope beyond 11.12 and exploit prevalence are not established in the provided bundle.

Mitigation direction

  • Check COINS or SySS guidance for fixed versions or official mitigations.
  • Restrict file upload access to trusted, authenticated users where operationally possible.
  • Review upload rendering paths for IFRAME handling and sanitization controls.
  • Increase monitoring for suspicious uploaded content and unusual user-session activity.

Validation and detection

  • Inventory COINS Construction Cloud deployments and confirm whether version 11.12 is present.
  • Confirm whether file upload features are enabled and reachable by untrusted users.
  • Review vendor advisory details for affected paths, fixed builds, and configuration guidance.
  • Perform only authorized, controlled stored-XSS validation in a non-production environment.
Prepared
Confidence
medium
Sources
4

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

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-45227 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
3Source 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.