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Vulnerabilities

Vulnerability · CVE-2026-2888

The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28.

Published Mar 13, 2026 · catalog updated Jun 17, 2026 · The Formidable Forms plugin

Check if you run it

No confirmed exploitation is on record for CVE-2026-2888. EPSS is 0.46%. Act only if a listed version of The Formidable Forms plugin is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The Formidable Forms plugin).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.46%
Remediation
Version ranges on file
Affected products
stated named in the record

The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-controlled JSON input and then using those values to recalculate payment amounts via field shortcode resolution in . The handler relies on a nonce that is publicly exposed in the page's JavaScript ( ), which provides CSRF protection but not authorization. This makes it possible for unauthenticated attackers to manipulate PaymentIntent amounts before payment completion on forms using dynamic pricing with field shortcodes, effectively paying a reduced amount for goods or services.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated named in the record<= 6.28

How to fix CVE-2026-2888

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-2888. EPSS is 0.46%. Act only if a listed version of The Formidable Forms plugin is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 6.28. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-639: Authorization Bypass Through User-Controlled Key. EPSS 0.46%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 13, 2026 · NIST NVD

    Detected

    The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-controlled JSON input and then using those values to recalculate payment amounts via field shortcode resolution in . The handler relies on a nonce that is publicly exp

  2. Jun 17, 2026 · NIST NVD

    Updated

    The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-controlled JSON input and then using those values to recalculate payment amounts via field shortcode resolution in . The handler relies on a nonce that is publicly exp

Sources

  • CVE.orgVulnerability recordCVE-2026-2888

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-2888

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-2888

    The Formidable Forms plugin for WordPress is vulnerable to an authorization bypass through user-controlled key in all versions up to, and including, 6.28. This is due to the AJAX handler ( ) overwriting the global data with attacker-c

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.