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PatchSiren cyber security CVE debrief

CVE-2026-65508 NSquared CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-06T15:17:14.957Z and has not been modified since then. CVE-2026-65508 is a critical unauthenticated SQL injection vulnerability in Simply Schedule Appointments plugin version 1.6.12.10 or earlier, with a CVSS score of 9.3. This vulnerability allows attackers to inject malicious SQL code, potentially leading to data breaches or system compromise. Organizations should prioritize immediate defensive actions. Further verification is recommended by verifying affected product deployments, reviewing official advisories, and planning vendor-supported updates or mitigations.

Vendor
NSquared
Product
Simply Schedule Appointments
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-06
Original CVE updated
2026-08-06
Advisory published
2026-08-06
Advisory updated
2026-08-06

Who should care

Administrators and users of Simply Schedule Appointments plugin, cybersecurity professionals, and organizations using the affected plugin versions should prioritize immediate defensive actions due to the critical severity of this vulnerability. This includes inventorying and verifying affected plugin versions, applying vendor remediation or patches if available, and implementing compensating controls such as web application firewalls.

Technical summary

CVE-2026-65508 is a critical unauthenticated SQL injection vulnerability in Simply Schedule Appointments plugin version 1.6.12.10 or earlier, with a CVSS score of 9.3. This vulnerability allows attackers to inject malicious SQL code, potentially leading to data breaches or system compromise. Organizations should prioritize immediate defensive actions.

Defensive priority

Organizations using Simply Schedule Appointments plugin version 1.6.12.10 or earlier should prioritize immediate defensive actions due to the critical severity of this vulnerability.

Recommended defensive actions

  • Inventory and verify affected Simply Schedule Appointments plugin versions.
  • Apply vendor remediation or patches if available.
  • Implement compensating controls such as web application firewalls.
  • Monitor for suspicious SQL injection attempts.
  • Exception tracking and retest after mitigation.

Evidence notes

Evidence is limited; primary official records indicate an unauthenticated SQL injection vulnerability in Simply Schedule Appointments plugin version 1.6.12.10 or earlier. Further verification is recommended. Defenders should verify affected product deployments, review official advisories, and plan vendor-supported updates or mitigations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-65508 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-65508

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

  • CVE-2026-65508 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-65508

    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.