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CVE-2026-125055 Chatterbug Forms <= 1.0.2 - Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission

9.8 criticalEPSS 1.1%

Critical (9.8) in sameh101 chatterbug forms – fast, flexible wordpress form builder. EPSS 1.1% estimated probability of exploitation activity in the next 30 days.

On this page
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.

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
1.1% estimated probability of exploitation activity in the next 30 days; 67th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: yes · Technical impact: total, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-434 Unrestricted Upload of File with Dangerous Type
OWASP Top 10
A06:2025 Insecure Design
Published
Modified
Assigned by
Wordfence (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

  • sameh101:chatterbug forms – fast, flexible wordpress form builder

Versions

From the CNA's record in the CVE List.

ProductAffected
sameh101 Chatterbug Forms – Fast, Flexible WordPress Form Builderthrough 1.0.2

Attack patterns (CAPEC)

  • CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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