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CVE-2026-100155
Ninja Forms <= 3.15.5 - Unauthenticated Arbitrary Shortcode Execution via 'formData' Field Value via Success Message Merge Tag
Medium6.5EPSS 0.51%
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
Description
The The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
References (9)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a1cf42f7-77c6-4594-a6a4-cebf5c3558d7?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Actions/SuccessMessage.php#L63 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Actions/SuccessMessage.php#L70 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/AJAX/Controllers/Submission.php#L52 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/Abstracts/MergeTags.php#L64 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/MergeTags/Fields.php#L268 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.4/includes/AJAX/Controllers/Submission.php#L60 (opens in a new tab)
- https://wordpress.org/plugins/ninja-forms/ (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3749135%40ninja-forms%2Ftags%2F3.15.6&old=3717122%40ninja-forms%2Ftags%2F3.15.5 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-100155)Record last updated .