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MainWP Broken Link Checker <= 4.0 — Missing Authorization to Arbitrary Plugin Activation

b64bd2b9-56d5-47d4-9532-3718bf2381a7Published · Updated

Action summary

Affected: ≤4.0No patch available

What to do until a fix ships
Watch plugin
Severity
Medium5.4
CVSS
5.4
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:L Availability
Low
Weakness
CWE-862 Missing Authorization
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

MainWP Broken Link Checker mainwp-broken-links-checker-extension

  1. Affected≤ 4.0
  2. PatchedNo fix yet

No patched version available.

You are affected if you run ≤ 4.0. No fixed version has been released.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MainWP Broken Link Checker.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch MainWP Broken Link Checker to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Dave Jong.

The MainWP Broken Link Checker plugin for WordPress is vulnerable to authorization bypass in versions up to, and including 4.0 due to a missing capability check. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to activate arbitrary plugins.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in MainWP Broken Link Checker

All 3
More vulnerabilities in MainWP Broken Link Checker
SeverityVulnerabilityCVEPublished
Critical9.8Unauthenticated SQL Injection
≤4.0No patch available
CVE-2023-23737
High8.8Cross-Site Request Forgery
≤4.0.7Update to 4.0.8
—

Same weakness (Missing Authorization)

All Missing Authorization
Other Missing Authorization vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
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 medium, CVSS 5.4

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
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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