CVE-2026-107748 cozmoslabs CVE debrief

Who should care

WordPress administrators, security teams, and users with subscriber-level access and above should be aware of this vulnerability and take immediate action to prevent exploitation. They should verify exposure, prioritize remediation, and monitor for suspicious user profile changes and comment content. Additionally, defenders should review compensating controls for exposed systems and track exceptions, retest remediated assets, and close the item only after

Why it matters

CVE-2026-107748 allows authenticated attackers to inject web scripts via the 'display_name' parameter in User Profile Builder plugin versions up to 4.0.3. Defenders should verify exposure, prioritize remediation, and monitor for suspicious user profile changes and comment content.

• Attackers can inject malicious scripts that execute on page access
• Payload persists independently of user account changes
• Requires verification of user profile changes and comment content
• Remediation priority for WordPress administrators and security teams

Technical summary

The User Profile Builder plugin for WordPress is vulnerable to stored cross-site scripting via the 'display_name' parameter in all versions up to, and including, 4.0.3. This allows authenticated attackers with subscriber-level access and above to inject arbitrary web scripts that execute when a user accesses an injected page, potentially leading to unauthorized actions or data breaches. The vulnerability is caused by insufficient input sanitization and output escaping, and the payload persists in wp_comments.comment_author.

Defensive priority

Remediate vulnerable plugin versions, monitor for suspicious user profile changes

Recommended defensive actions

• Update User Profile Builder plugin to a version beyond 4.0.3
• Monitor user profile changes for suspicious activity
• Restrict user profile editing to trusted roles
• 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
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability allows authenticated attackers to inject arbitrary web scripts due to insufficient input sanitization and output escaping. The payload persists in wp_comments.comment_author, allowing the script to execute independently of the user's account status. Defenders should verify the presence of vulnerable plugin versions, review user profile changes, and monitor comment content for suspicious activity. The CVE record and vendor advisories provide additional context for understanding the vulnerability.

Sources and 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.