CVE-2026-39708 uicore CVE debrief

Who should care

Users of the UiCore Elements plugin, particularly those using versions up to and including 1.3.14, should be aware of this vulnerability and take necessary precautions. This includes operators, administrators, and security teams responsible for managing and securing systems that use the UiCore Elements plugin.

Technical summary

The vulnerability is caused by improper neutralization of input during web page generation, allowing for stored cross-site scripting (XSS). The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L. This issue affects UiCore Elements: from n/a through <= 1.3.14. The vulnerability requires low privileges and user interaction, with a CVSS score of 6.5 and a severity of MEDIUM.

Defensive priority

Medium priority, as the vulnerability requires low privileges and user interaction.

Recommended defensive actions

• Update the UiCore Elements plugin to a version beyond 1.3.14.
• Implement input validation and sanitization for user-generated content.
• Monitor for suspicious activity and implement compensating controls.
• Consider using a web application firewall (WAF) to detect and prevent XSS attacks.
• Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the scope and impact of the vulnerability. The CVE record was published on 2026-04-08T09:16:43.620Z and has not been modified since then. The NVD entry is currently Deferred. There may be additional information available from the vendor or other sources that can help defenders understand and mitigate this vulnerability.

Official resources