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PatchSiren cyber security CVE debrief

CVE-2026-39504 InstaWP CVE debrief

A Missing Authorization vulnerability was discovered in InstaWP Connect, affecting versions from n/a through 0.1.2.5. This issue allows for Exploiting Incorrectly Configured Access Control Security Levels, with a CVSS score of 5.4 and a severity of MEDIUM. The vulnerability has a significant impact on access control, potentially allowing unauthorized actions. Users should review their configurations and update to version 0.1.2.6 or later.

Vendor
InstaWP
Product
InstaWP Connect
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-24
Advisory published
2026-04-08
Advisory updated
2026-07-24

Who should care

Users of InstaWP Connect, especially those using versions 0.1.2.5 or earlier, should be aware of this vulnerability and take necessary actions to secure their installations. Operators, platform administrators, and security teams should review their configurations and update to version 0.1.2.6 or later.

Technical summary

The vulnerability, identified as CVE-2026-39504, is caused by a missing authorization mechanism in InstaWP Connect. This allows attackers to exploit incorrectly configured access control security levels. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L. Affected users should prioritize patching or mitigating this vulnerability.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it could potentially allow unauthorized actions.

Recommended defensive actions

  • Apply the latest patch or update for InstaWP Connect to version 0.1.2.6 or later.
  • Review and adjust access control configurations for InstaWP Connect installations.
  • Monitor InstaWP Connect installations for any suspicious activity.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-04-08T09:16:24.513Z and last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD details. Defenders should verify InstaWP Connect versions and configurations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-39504 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-39504

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

  • CVE-2026-39504 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-39504

    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.