PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-66623 Inisev CVE debrief

CVE-2026-66623 is a high-severity unauthenticated Cross Site Scripting (XSS) vulnerability in the Social Media & Share Icons plugin, version 2.9.9 and possibly earlier. The vulnerability allows attackers to inject malicious scripts into web pages viewed by other users. Defenders should assess exposure, prioritize remediation, and verify plugin versions.

Vendor
Inisev
Product
Social Media & Share Icons
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 and administrators of web applications using the Social Media & Share Icons plugin should assess exposure and prioritize remediation.

Why it matters

CVE-2026-66623 is a high-severity unauthenticated Cross Site Scripting (XSS) vulnerability in the Social Media & Share Icons plugin. Defenders should assess exposure, prioritize remediation, and verify plugin versions to prevent potential injection of malicious scripts and compromise of user sessions or sensitive data.

  • Potential injection of malicious scripts into web pages viewed by other users
  • Possible compromise of user sessions or sensitive data
  • Required verification of plugin versions and application of patches
  • Potential impact on web application security and integrity

Technical summary

CVE-2026-66623 is an unauthenticated Cross Site Scripting (XSS) vulnerability in the Social Media & Share Icons plugin, version 2.9.9 and possibly earlier. The vulnerability allows attackers to inject malicious scripts into web pages viewed by other users.

Defensive priority

Defenders should prioritize verifying plugin versions and applying patches. Assess exposure in web applications using the Social Media & Share Icons plugin, especially in environments with untrusted user access.

Recommended defensive actions

  • Verify plugin versions and apply patches
  • Assess exposure in web applications using the Social Media & Share Icons plugin
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. The Patchstack database entry confirms the vulnerability in version 2.9.9 of the Social Media & Share Icons plugin.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66623 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66623

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

  • CVE-2026-66623 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66623

    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.