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CVE Record

CVE-2020-37044: OpenCTI 3.3.1 - Cross Site Scripting

OpenCTI 3.3.1 is vulnerable to a reflected cross-site scripting (XSS) attack via the /graphql endpoint. An attacker can inject arbitrary JavaScript code by sending a crafted GET request with a malicious payload in the query string, leading to execution of JavaScript in the victim's browser. For example, a request to /graphql?'"--></style></scRipt><scRipt>alert('Raif_Berkay')</scRipt> will trigger an alert. This vulnerability was discovered by Raif Berkay Dincel and confirmed on Linux Mint and Windows 10.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-37044 is a reflected cross-site scripting issue in OpenCTI 3.3.1. If a user is tricked into opening a crafted link to the OpenCTI /graphql endpoint, JavaScript can run in that user’s browser. Business impact is mainly account-context data exposure or actions performed as the victim, not server takeover.

Executive priority

Treat as a medium-priority web application risk. Prioritize if OpenCTI 3.3.1 is internet-facing or used by privileged threat intelligence analysts. It is less urgent than unauthenticated server compromise, but public exploit information and phishing-style delivery justify timely validation and remediation.

Technical view

OpenCTI 3.3.1 does not properly neutralize input in a GET request query string to /graphql, allowing reflected XSS. The CVSS 3.1 score is 5.4, with network attack vector, low complexity, no privileges required, and user interaction required. CWE-79 applies. Public references include CVE, VulnCheck, and Exploit-DB.

Likely exposure

Exposure is limited to organizations running OpenCTI 3.3.1, especially where users can access OpenCTI through browsers and receive attacker-controlled links. Internet-facing deployments increase phishing and drive-by link risk. The provided sources do not identify other affected versions.

Exploitation context

The issue has a public Exploit-DB entry, but the source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires user interaction: a victim must open a crafted request targeting the vulnerable OpenCTI /graphql endpoint.

Researcher notes

Do not assume impact beyond reflected XSS in OpenCTI 3.3.1. Sources identify /graphql and user interaction but do not provide evidence of active exploitation, KEV status, or a named patch. Validate using logs, version checks, and vendor guidance rather than unsafe reproduction in production.

Mitigation direction

  • Identify any OpenCTI 3.3.1 deployments in production, staging, or exposed lab environments.
  • Check OpenCTI vendor or project guidance for fixed versions or official remediation.
  • Upgrade away from OpenCTI 3.3.1 if vendor guidance confirms a safe target version.
  • Restrict OpenCTI access to trusted networks or authenticated users where operationally possible.
  • Monitor for unusual browser-driven GET requests to the /graphql endpoint.

Validation and detection

  • Confirm the installed OpenCTI version is not 3.3.1.
  • Review asset inventory for public or partner-accessible OpenCTI instances.
  • Check web logs for suspicious /graphql requests with script-like encoded content.
  • Verify compensating controls limit untrusted access to OpenCTI.
  • Document vendor advisory status and remediation decision for vulnerability management tracking.
Prepared
Confidence
high
Sources
6

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.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2020-37044 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.4 (3.1)
Known Exploited
No
Published

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

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
5Source 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
5.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N2.82.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.4Medium
CVSS 3.1 vector shape for CVE-2020-37044Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
FiligranOpenCTI3.3.1Listed
Weakness

CWE details

CWE-79

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