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PatchSiren cyber security CVE debrief

CVE-2026-111966 User Profile Builder CVE debrief

The User Profile Builder WordPress plugin before 4.0.5 is vulnerable to Stored Cross-Site Scripting attacks. This vulnerability allows users with a role as low as contributor to perform attacks against higher-privileged users who submit the affected form. Defenders responsible for WordPress installations with the User Profile Builder plugin should assess exposure and prioritize patching. The CVE record was published on 2026-10-23T06:00:19.223Z and has not been modified since then. AI-assisted PatchSiren debrief based on the supplied source corpus.

Vendor
User Profile Builder
Product
User Profile Builder
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-23
Original CVE updated
2026-10-23
Advisory published
2026-10-23
Advisory updated
2026-10-23

Who should care

Defenders responsible for WordPress installations with the User Profile Builder plugin should assess exposure and prioritize patching to prevent Stored Cross-Site Scripting attacks.

Why it matters

CVE-2026-111966 allows Stored Cross-Site Scripting attacks against higher-privileged users who submit the affected form in User Profile Builder versions before 4.0.5.

  • Defenders must verify the version of User Profile Builder to determine exposure
  • Defenders should restrict form submissions to prevent exploitation
  • Defenders need to monitor for suspicious activity related to the User Profile Builder plugin

Technical summary

The User Profile Builder WordPress plugin before 4.0.5 does not sanitize and escape one of its shortcode attributes before outputting it back in a redirect message, allowing users with a role as low as contributor to perform Stored Cross-Site Scripting attacks against higher-privileged users who submit the affected form. This vulnerability can be mitigated by verifying the version of User Profile Builder and applying the patch. Defenders should restrict form submissions to prevent exploitation and monitor for suspicious activity related to the User Profile Builder plugin.

Defensive priority

Defenders should prioritize verifying the version of User Profile Builder and applying the patch to prevent Stored Cross-Site Scripting attacks.

Recommended defensive actions

  • Verify the version of User Profile Builder and apply the patch to prevent Stored Cross-Site Scripting attacks
  • Restrict form submissions to prevent exploitation
  • Monitor for suspicious activity related to the User Profile Builder plugin
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide limited information about the vulnerability, including its existence in User Profile Builder versions before 4.0.5 and the possibility of Stored Cross-Site Scripting attacks.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-111966 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-111966

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

  • CVE-2026-111966 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-111966

    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.