Quick answers
- Is CVE-2026-66639 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-66639 being exploited in the wild.
- How severe is CVE-2026-66639?
- Medium severity, with a CVSS score of 6.5, published 18 August 2026.
- Which products and versions are affected?
- WPZOOM Forms – Contact Form Plugin for Gutenberg <=2.0.7.
- Is there a fix for CVE-2026-66639?
- A patch was published on 2026-08-18: Patched in version 2.0.8 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-66639 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-66639?
- Check whether you run WPZOOM Forms – Contact Form Plugin for Gutenberg 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
The vulnerability is a stored Cross-Site Scripting (XSS) flaw in WPZOOM Forms Contact Form Plugin for Gutenberg affecting versions up to 2.0.7. The vulnerability requires contributor-level or higher privilege to initiate, meaning an authenticated user with plugin management or form editing permissions must perform a malicious action (such as submitting a crafted form or clicking a malicious link). An attacker exploiting this flaw can inject arbitrary JavaScript code into the site, leading to theft of visitor data, session hijacking, or account takeover. The vulnerability has been patched in version 2.0.8 and later; users should update immediately.
Affected products
- WPZOOM Forms – Contact Form Plugin for Gutenberg <=2.0.7
Timeline
- 2026-07-09: disclosed: Vulnerability reported to Patchstack
- 2026-08-18: advisory: Vulnerability published by Patchstack
- 2026-08-18: patched: Patched in version 2.0.8