CVE-2026-15748 json
Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration
published 2026-08-18 2 mo ago modified 2026-10-22 17 d ago also EUVD-2026-60569
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.1%
- EPSS 4.1% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.56.1 via the handle_file_upload function. This is due to insufficient file type validation in handle_file_upload, where the dangerous-extension blocklist performs exact-key matching that is bypassed by pipe-alternative MIME type keys, combined with a public submission handler that trusts attacker-controlled upload field configuration injected via a forged Select field value. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
4.09% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/263ac05d-f1ca-46e3-a43e-3b45eb8066d4?source=cve
- plugins.trac.wordpress.org /browser/forminator/tags/1.55.1/library/fields/upload.php#L552
- plugins.trac.wordpress.org /browser/forminator/tags/1.55.1/library/modules/custom-forms/front/front-action.php#L2767
- plugins.trac.wordpress.org /browser/forminator/tags/1.55.1/library/modules/custom-forms/front/front-action.php#L738
- plugins.trac.wordpress.org /browser/forminator/tags/1.55.1/library/helpers/helper-fields.php#L3425
- plugins.trac.wordpress.org /browser/forminator/tags/1.55.1/library/abstracts/abstract-class-field.php#L2308
- plugins.trac.wordpress.org /browser/forminator/tags/1.55.1/admin/classes/class-admin-ajax.php#L1196
Sources
- CVE List CVE-2026-15748
- NVD CVE-2026-15748
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.