Quick answers
- Is CVE-2026-66616 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-66616 being exploited in the wild.
- How severe is CVE-2026-66616?
- High severity, with a CVSS score of 7.1, published 20 August 2026.
- Which products and versions are affected?
- 10Web Form Maker <=1.15.47.
- Is there a fix for CVE-2026-66616?
- 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-2026-66616 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-66616?
- Check whether you run 10Web Form Maker 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 an unauthenticated cross-site scripting (XSS) flaw in Form Maker by 10Web plugin versions up to 1.15.47. The root cause involves improper input validation or output encoding in form processing, allowing attackers to inject arbitrary JavaScript into form fields. Exploitation requires user interaction (e.g., clicking a malicious link or visiting a crafted page containing the payload). The attack is network-reachable and does not require authentication. An attacker can steal session cookies, capture form submissions, redirect users, or perform actions on behalf of visitors. No official patch has been released as of the advisory publication date; Patchstack has issued a temporary mitigation rule.
Affected products
- 10Web Form Maker <=1.15.47
Timeline
- 2026-08-20: disclosed
- 2026-08-19: advisory: Patchstack advisory published