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PatchSiren cyber security CVE debrief

CVE-2026-28166 GoodLayers CVE debrief

CVE-2026-28166 is a high-severity, unauthenticated Cross Site Scripting (XSS) vulnerability affecting Tourmaster versions up to 5.4.9. The CVE record was published on 2026-08-24T12:16:50.723Z and was last modified on 2026-10-12T15:10:00.207Z. The NVD entry is currently Deferred.

Vendor
GoodLayers
Product
Tourmaster
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-24
Original CVE updated
2026-10-12
Advisory published
2026-08-24
Advisory updated
2026-10-12

Who should care

Defenders responsible for Tourmaster installations should assess exposure and prioritize verification of XSS attacks.

Why it matters

CVE-2026-28166 is a high-severity XSS vulnerability in Tourmaster that requires verification of exposure and prioritization of defensive measures.

  • Defenders must verify Tourmaster installations for exposure to prevent potential XSS attacks.
  • Successful exploitation could lead to unauthorized script execution.
  • Defenders should prioritize monitoring for suspicious activity.
  • Remediation efforts should focus on upgrading to a patched version.

Technical summary

CVE-2026-28166 is a high-severity, unauthenticated Cross Site Scripting (XSS) vulnerability affecting Tourmaster versions up to 5.4.9. The vulnerability has a CVSS score of 7.1 and is considered high severity.

Defensive priority

Defenders should prioritize verifying exposure of Tourmaster installations and assessing the potential for XSS attacks.

Recommended defensive actions

  • Verify Tourmaster installations for exposure
  • Assess the potential for XSS attacks
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD detail page provide limited information about the vulnerability, with the primary source being Patchstack.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-28166 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-28166

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-28166 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-28166

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.