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CVE Record

CVE-2021-43852: JavaScript Prototype Pollution in oro/platform

OroPlatform is a PHP Business Application Platform. In affected versions by sending a specially crafted request, an attacker could inject properties into existing JavaScript language construct prototypes, such as objects. Later this injection may lead to JS code execution by libraries that are vulnerable to Prototype Pollution. This issue has been patched in version 4.2.8. Users unable to upgrade may configure a firewall to drop requests containing next strings: `__proto__` , `constructor[prototype]`, and `constructor.prototype` to mitigate this issue.

HighCVSS 8.8Not KEV-listedUpdated
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

OroPlatform versions before 4.2.8 can let an attacker place attacker-controlled properties onto JavaScript object prototypes through crafted requests. That can become code execution when later processed by libraries vulnerable to prototype pollution. Treat exposed OroPlatform applications as high priority, especially where the platform supports business workflows or customer-facing portals.

Executive priority

High. This affects a business application platform and can create a path toward JavaScript code execution depending on application libraries. Patch promptly where OroPlatform is deployed, but do not treat it as known exploited without new evidence.

Technical view

The advisory describes JavaScript prototype pollution in oroinc/platform before 4.2.8. CVSS 3.1 is 8.8 with network attack vector, low complexity, no privileges, user interaction required, and changed scope. Impact depends on downstream JavaScript libraries consuming polluted objects, which may lead to JS code execution.

Likely exposure

Exposure is limited to deployments using oroinc/platform below version 4.2.8. Public internet exposure increases urgency, but the source bundle does not identify specific hosted services, default configurations, or related Oro products beyond platform.

Exploitation context

CISA KEV is false in the provided bundle, and no cited source states active exploitation. Public advisory and patch references exist. The exact request shape and user-interaction requirement are not detailed in the provided evidence, so avoid assuming exploit maturity.

Researcher notes

The key uncertainty is exploitability in a specific application: prototype pollution impact depends on reachable request handling and vulnerable downstream JavaScript behavior. CVSS indicates UI:R, but the source text does not explain the required interaction. Validate exposure by version and review the vendor patch for affected code paths.

Mitigation direction

  • Upgrade oroinc/platform to version 4.2.8 or later.
  • If unable to upgrade, apply the vendor-described firewall filtering for prototype pollution keys.
  • Review vendor guidance before relying on filtering as a long-term control.
  • Prioritize remediation for internet-facing or business-critical OroPlatform deployments.

Validation and detection

  • Inventory all OroPlatform deployments and confirm their platform version.
  • Check dependency manifests or deployed artifacts for oroinc/platform below 4.2.8.
  • Verify firewall or WAF controls match the vendor advisory mitigation.
  • Confirm post-upgrade application workflows and JavaScript-heavy pages still function.
Prepared
Confidence
high
Sources
4

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

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-74: Exact CWE lookup

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. 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-2021-43852 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H2.85.3Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2021-43852Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
oroincplatform< 4.2.8Listed
Weakness

CWE details

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

CWE-74 · source CWE mapping

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.