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Custom Contact Forms <= 5.1.0.3 — Missing Authorization

6d3bfb78-0538-4627-a206-8d8b5b200bc7Published · Updated

Action summary

Affected: <5.1.0.4Update to 5.1.0.4 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-862 Missing Authorization
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Custom Contact Forms custom-contact-forms

  1. Affected< 5.1.0.4
  2. Patched in5.1.0.4

Update to 5.1.0.4 or newer.

You are affected if you run < 5.1.0.4. Version 5.1.0.4 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Custom Contact Forms.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 5.1.0.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Custom Contact Forms to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Marc-Alexandre Montpas.

The Custom Contact Forms plugin for WordPress is vulnerable to authentication bypass due to missing capability checks on admin_init() function called via an 'init' hook in versions before 5.1.0.4. This makes it possible for unauthenticated attackers to download and modify the database of the affected site.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Custom Contact Forms

All 3
More vulnerabilities in Custom Contact Forms
SeverityVulnerabilityCVEPublished
Medium4.3Missing Authorization to Authenticated (Contributor+) Arbitrary Post Deletion and Post Meta Modification via Nested 'fields[].ID' / 'choices[].ID' Parameters
≤7.16Update to 7.16.1
CVE-2026-75018
Medium6.1Reflected Cross-Site Scripting
<5.1.0.3Update to 5.1.0.3
—

Same weakness (Missing Authorization)

All Missing Authorization
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CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
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Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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