Is CVE-2026-84817 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-84817 being exploited in the wild.

How severe is CVE-2026-84817?

High severity, with a CVSS score of 7.1, published 8 September 2026.

Which products and versions are affected?

Crocoblock JetFormBuilder 3.6.5.1 and earlier.

Is there a fix for CVE-2026-84817?

A patch was published on 2026-09-07: patched in version 3.6.5.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-84817 attacked?

It is attacked over the network.

Am I affected by CVE-2026-84817?

Check whether you run Crocoblock JetFormBuilder 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.

CVE-2026-84817: JetFormBuilder unauthenticated cross-site scripting (XSS)

CVE-2026-84817 · Severity: high · CVSS 7.1 · Published 2026-09-08

JetFormBuilder is a WordPress plugin used to create and manage web forms on websites. An unauthenticated attacker can inject malicious scripts into affected sites that steal visitor data, hijack user accounts, or redirect users to phishing pages. The vulnerability affects all versions up to 3.6.5.1 and requires user interaction to exploit, but can be delivered at scale through mass-exploit campaigns.

Technologies: Crocoblock JetFormBuilder. Vendors: Crocoblock.

Quick answers

Is CVE-2026-84817 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-84817 being exploited in the wild.
How severe is CVE-2026-84817?: High severity, with a CVSS score of 7.1, published 8 September 2026.
Which products and versions are affected?: Crocoblock JetFormBuilder 3.6.5.1 and earlier.
Is there a fix for CVE-2026-84817?: A patch was published on 2026-09-07: patched in version 3.6.5.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-84817 attacked?: It is attacked over the network.
Am I affected by CVE-2026-84817?: Check whether you run Crocoblock JetFormBuilder 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

This is a reflected or stored cross-site scripting (XSS) vulnerability in JetFormBuilder versions ≤ 3.6.5.1. The plugin fails to properly sanitize and validate user input, allowing attackers to inject arbitrary JavaScript code that executes in the context of a victim's browser. The vulnerability requires unauthenticated access but may require user interaction (such as clicking a malicious link or visiting a crafted page) for successful exploitation. An attacker can steal session cookies, credentials, or perform actions on behalf of the victim. The issue has been patched in version 3.6.5.2 or later.

Affected products

Crocoblock JetFormBuilder 3.6.5.1 and earlier

Timeline

2026-09-07: disclosed
2026-09-07: patched: patched in version 3.6.5.2

References

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