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PatchSiren cyber security CVE debrief

CVE-2026-109686 Link Whisper INC CVE debrief

A critical vulnerability was found in the WordPress Link Whisper Free plugin, affecting versions up to 0.9.7. This issue allows for PHP Object Injection due to deserialization of untrusted data. The vulnerability has a CVSS score of 9.8 and is considered critical. WordPress administrators and users of the Link Whisper Free plugin should assess their exposure and take immediate action to update the plugin to prevent potential attacks. The CVE record and source item provide details on the vulnerability, including its CVSS score and affected versions. However, there is limited information on potential exploits or impacts. It is essential to review and monitor plugin usage and versions

Vendor
Link Whisper INC
Product
Link Whisper Free
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-15
Original CVE updated
2026-10-15
Advisory published
2026-10-15
Advisory updated
2026-10-15

Who should care

WordPress administrators and users of the Link Whisper Free plugin should assess their exposure and take immediate action to update the plugin to prevent potential attacks.

Why it matters

CVE-2026-109686 is a critical vulnerability in the WordPress Link Whisper Free plugin, allowing for PHP Object Injection. It has a CVSS score of 9.8 and requires immediate attention to update the plugin and prevent potential attacks.

  • Potential for PHP Object Injection attacks
  • Critical vulnerability with high CVSS score
  • Requires immediate attention and remediation

Technical summary

The Link Whisper Free plugin for WordPress, versions up to 0.9.7, is vulnerable to PHP Object Injection due to deserialization of untrusted data. This critical vulnerability has a CVSS score of 9.8. The vulnerability allows for potential PHP Object Injection attacks, and immediate attention is required to update the Link Whisper Free plugin to a version beyond 0.9.7 to prevent such attacks. The plugin's vulnerability is considered critical, and its CVSS score indicates a high severity level.

Defensive priority

Immediate attention is required to update the Link Whisper Free plugin to a version beyond 0.9.7 to prevent potential PHP Object Injection attacks.

Recommended defensive actions

  • Update the Link Whisper Free plugin to version 0.9.8 or later
  • Review and monitor plugin usage and versions in your WordPress environment
  • Consider implementing additional security measures for your WordPress installation

Evidence notes

The CVE record and source item provide details on the vulnerability, including its CVSS score and affected versions. However, there is limited information on potential exploits or impacts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-109686 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-109686

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

  • CVE-2026-109686 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-109686

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

Supplemental references

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.