Formidable Forms <= 6.35 - Authenticated (Subscriber+) Arbitrary Plugin Installation via 'file_url' Parameter
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
The Formidable Forms WordPress plugin, a form builder used on WordPress websites, is affected when the Pro version is not installed. Authenticated users with basic subscriber-level access can exploit a flaw to install arbitrary plugins on the server, potentially giving them control over the website.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
The Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More plugin for WordPress is vulnerable to Arbitrary Plugin Installation in all versions up to, and including, 6.35 via the 'file_url' parameter parameter. This is due to insufficient URL prefix validation in validate_url_is_in_s3_bucket() and a permission callback that relies solely on a shared token obtainable by any user with the delegable frm_view_forms capability, without checking install_plugins or activate_plugins capabilities. This makes it possible for authenticated attackers, with subscriber-level access and above, to install arbitrary plugins on the server. Exploitation additionally requires that the site is free-only (Formidable Pro is NOT installed).
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- strategy11team Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder
through 6.35
References 8
plugins.trac.wordpress.org
- browser/formidable/tags/6.35/classes/controllers/FrmAddonsController.php#L1514
- browser/formidable/tags/6.35/classes/controllers/FrmAddonsController.php#L1489
- browser/formidable/tags/6.35/classes/helpers/FrmAppHelper.php#L4934
- browser/formidable/tags/6.35/classes/controllers/FrmAddonsController.php#L1459
- browser/formidable/tags/6.35/classes/controllers/FrmAppController.php#L1167
- changeset?reponame=&new=3750372%40formidable%2Ftags%2F7.0&old=3688662%40formidable%2Ftags%2F6.35
- changeset/3746820/formidable/trunk/classes/controllers/FrmAddonsController.php