CVE-2026-116858: Forminator Forms cross-site scripting (XSS) vulnerability
medium 4.3 affects latest 1.58.3 published 2026-11-03
- Affected versions
- 1.58.3 and older
- Fixed in
- no fix yet
- Latest version
- 1.58.3
- Severity
- Medium · CVSS 4.3
- Active installs
- 600,000+
- Type
- Cross-site scripting (XSS)
What an attacker needs
- Access: A low-level account on the site, such as a subscriber or customer (per the CVSS score).
CVSS vector (score by Patchstack): CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
What to do now
- There is no fixed version yet. If you can manage without Forminator Forms for now, deactivate and delete it until the developer ships a fix.
- If you must keep it, cut down who can log in (remove unused accounts, especially low-level ones, and turn off open registration) and put a web application firewall in front of the site.
- Check the Forminator Forms page for a fix; it updates when the CVE feeds do.
- Not sure which version you run? Check your version against every known Forminator Forms issue.
With WP-CLI:
wp plugin get forminator --field=version. - If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.
The advisory
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in WPMU DEV Forminator forminator allows Code Injection.This issue affects Forminator: from n/a through 1.58.3.
References
- NVD CVE-2026-116858 nvd.nist.gov
- Patchstack advisory patchstack.com
Related
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Where this data comes from
- CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Versions and install counts: wordpress.org/plugins/forminator (Plugins API), fetched 2026-11-01.
- The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.