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CVE Record

CVE-2021-37788: A vulnerability in the web UI of Gurock TestRail v5.3.0.3603 could allow an unauthenticated, remote attacke...

A vulnerability in the web UI of Gurock TestRail v5.3.0.3603 could allow an unauthenticated, remote attacker to affect the integrity of a device via a clickjacking attack. The vulnerability is due to insufficient input validation of iFrame data in HTTP requests that are sent to an affected device. An attacker could exploit this vulnerability by sending crafted HTTP packets with malicious iFrame data. A successful exploit could allow the attacker to perform a clickjacking attack where the user is tricked into clicking a malicious link.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-37788 describes a clickjacking issue in the Gurock TestRail v5.3.0.3603 web UI. An attacker could trick a user into clicking a malicious link or framed interface, potentially affecting integrity. The public bundle does not provide a CVSS score, CWE, patch version, or confirmed affected-version range beyond the named release.

Executive priority

Treat this as an exposure-verification item, not a confirmed emergency from the provided evidence. Prioritize if TestRail v5.3.0.3603 is in use on a user-accessible web interface, then seek vendor guidance because the sources do not name a patch or severity score.

Technical view

The CVE states the web UI insufficiently validates iFrame data in HTTP requests, enabling an unauthenticated remote attacker to supply malicious iFrame data and conduct clickjacking. The record does not document authentication requirements for the victim, affected endpoints, fixed versions, or vendor remediation.

Likely exposure

Likely exposure is limited to organizations running Gurock TestRail v5.3.0.3603, especially where the web UI is reachable by users through browsers. The source bundle lists affected vendor/product fields as n/a, so exposure should be confirmed from asset inventory and vendor records.

Exploitation context

The provided sources do not indicate active exploitation, KEV listing, public weaponization, or real-world incidents. The described attack requires tricking a user into interacting with malicious content, which makes exposure dependent on user access and browser-facing TestRail deployment conditions.

Researcher notes

Key gaps are material: no CVSS, CWE, fixed version, detailed affected range, or exploitation evidence in the provided bundle. The CVE description attributes risk to clickjacking through insufficient validation of iFrame data in HTTP requests, but does not provide enough detail to validate endpoint-level impact from the record alone.

Mitigation direction

  • Check Gurock/TestRail vendor guidance for affected and fixed versions.
  • Inventory TestRail instances and identify any v5.3.0.3603 deployments.
  • Restrict TestRail web UI access while remediation status is confirmed.
  • Review application framing protections against your security baseline.
  • Prioritize upgrade or configuration changes only when vendor guidance confirms them.

Validation and detection

  • Confirm deployed TestRail versions from asset inventory or administrators.
  • Check whether TestRail web UI is internet-accessible or broadly reachable.
  • Review response headers and framing controls against internal standards.
  • Search vulnerability management records for CVE-2021-37788 coverage.
  • Document uncertainty where vendor fix information is unavailable.
Prepared
Confidence
low
Sources
3

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.

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CVE-2021-37788 mapping review

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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
2Source 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.