CVE-2026-39696: Elfsight WhatsApp Chat CC DOM-based XSS

CVE-2026-39696 · Severity: medium · CVSS 6.5 · Published 2026-04-08

The Elfsight WhatsApp Chat CC plugin for WordPress, which allows website owners to integrate WhatsApp messaging for customer support, contains a security flaw. An attacker with basic contributor-level access could inject malicious scripts into the website. If a site visitor or administrator interacts with the affected page, the script could redirect them to malicious sites, display unauthorized advertisements, or steal session information.

Vendors: Elfsight.

Quick answers

Is CVE-2026-39696 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-39696 being exploited in the wild.
How severe is CVE-2026-39696?
Medium severity, with a CVSS score of 6.5, published 8 April 2026.
Which products and versions are affected?
Elfsight WhatsApp Chat CC <= 1.2.0.
Is there a fix for CVE-2026-39696?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-39696 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-39696?
Check whether you run Elfsight WhatsApp Chat CC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the Elfsight WhatsApp Chat CC plugin for WordPress (versions <= 1.2.0) due to improper neutralization of input during web page generation. The vulnerability requires 'Contributor' level privileges to exploit and relies on user interaction (UI:R) from a victim. An attacker can inject malicious JavaScript payloads that execute within the context of the victim's browser session. As of the advisory date, no official patch has been released, and the vulnerability is classified under CWE-79.

Affected products

  • Elfsight Elfsight WhatsApp Chat CC <= 1.2.0

Timeline

  • 2026-01-27: other: Reported by researcher benzdeus
  • 2026-02-26: disclosed: Vulnerability disclosed by Patchstack
  • 2026-04-08: advisory: CVE published to NVD

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.