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PatchSiren cyber security CVE debrief

CVE-2026-42743 ThemeGrill CVE debrief

CVE-2026-42743 is a MEDIUM-severity vulnerability affecting Masteriyo - LMS versions up to 2.1.8. The vulnerability is described as Unauthenticated Broken Authentication. The CVE record was published on 2026-06-15T21:16:57.117Z and was last modified on 2026-10-25T23:10:00.167Z. The NVD entry is currently Deferred.

Vendor
ThemeGrill
Product
Masteriyo - LMS
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-10-25
Advisory published
2026-06-15
Advisory updated
2026-10-25

Who should care

Defenders responsible for Masteriyo - LMS installations, especially those using versions up to 2.1.8, should assess their exposure and consider verifying the authentication mechanisms and updating to a patched version if available.

Why it matters

CVE-2026-42743 is a MEDIUM-severity vulnerability affecting Masteriyo - LMS versions up to 2.1.8, described as Unauthenticated Broken Authentication. Defenders should prioritize verifying authentication mechanisms, consider updating to a patched version, and monitor for suspicious activity.

  • Verify authentication mechanisms to prevent unauthorized access.
  • Update to a patched version if available to fix the broken authentication.
  • Monitor for suspicious activity related to authentication.

Technical summary

The vulnerability is described as Unauthenticated Broken Authentication in Masteriyo - LMS <= 2.1.8 versions. The CVSS score is 6.5, and the severity is MEDIUM. The CVE record and NVD entry provide official details.

Defensive priority

Defenders should prioritize verifying the authentication mechanisms in Masteriyo - LMS installations, especially for versions up to 2.1.8, and consider updating to a patched version if available.

Recommended defensive actions

  • Verify the authentication mechanisms in Masteriyo - LMS installations, especially for versions up to 2.1.8.
  • Consider updating to a patched version if available.
  • Monitor for any suspicious activity related to authentication in Masteriyo - LMS.

Evidence notes

The vulnerability is described as Unauthenticated Broken Authentication in Masteriyo - LMS <= 2.1.8 versions. The CVSS score is 6.5, and the severity is MEDIUM. The CVE record and NVD entry provide official details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42743 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42743

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

  • CVE-2026-42743 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42743

    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.