Vulnerability record
CVE-2026-125055
The short answer
CVE-2026-125055 affects sameh101 Chatterbug Forms – Fast, Flexible WordPress Form Builder and is rated critical (CVSS 9.8). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 1.1%.
What it is
The Chatterbug Forms – Fast, Flexible WordPress Form Builder plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.0.2 via the cbforms_check_form_submissions function. This is due to missing server-side file extension validation in cbforms_check_form_submissions(), where the allowed-type check defaults to the uploaded file's own extension when no field restriction is configured, trivially allowing any extension including .php. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The submission nonce printed inline on every public page containing a Chatterbug form is freely obtainable by unauthenticated visitors and therefore does not constitute an effective access control barrier.
Weakness: CWE-434.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
1.1%
Higher than 67% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Affected products
Chatterbug Forms – Fast, Flexible WordPress Form Builder. NVD's record lists the exact affected versions.
References
- plugins.trac.wordpress.org/browser/chatterbug-forms/tags/1.0.2/chatterbug-forms.php#L308
- plugins.trac.wordpress.org/browser/chatterbug-forms/tags/1.0.2/chatterbug-forms.php#L331
- plugins.trac.wordpress.org/browser/chatterbug-forms/tags/1.0.2/chatterbug-forms.php#L422
- plugins.trac.wordpress.org/browser/chatterbug-forms/tags/1.0.2/chatterbug-forms.php#L510
- plugins.trac.wordpress.org/changeset/3794492/chatterbug-forms/trunk/chatterbug-forms.php
- www.wordfence.com/threat-intel/vulnerabilities/id/7819c1fa-884b-4f1d-ba63-84057bf6da84?source=cve
Questions
Is CVE-2026-125055 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-13. FIRST's EPSS estimates a 1.1% chance of exploitation in the next 30 days.
How do I fix CVE-2026-125055?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Deferred. The description is NVD's text, quoted as published.
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