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MailPoet Newsletters <= 2.6.6 — Arbitrary File Upload

CVE-2014-4725Published · Updated

Action summary

Affected: ≤2.6.6Update to 2.6.7 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-434 Arbitrary File Upload
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

MailPoet Newsletters (Previous) wysija-newsletters

  1. Affected≤ 2.6.6
  2. Patched in2.6.7

Update to 2.6.7 or newer.

You are affected if you run ≤ 2.6.6. Version 2.6.7 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MailPoet Newsletters (Previous).
  • 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 2.6.7, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch MailPoet Newsletters (Previous) to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Sucuri Research Team.

The MailPoet Newsletters (wysija-newsletters) plugin before 2.6.7 for WordPress allows remote attackers to bypass authentication and execute arbitrary PHP code by uploading a crafted theme using wp-admin/admin-post.php and accessing the theme in wp-content/uploads/wysija/themes/mailp/.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in MailPoet Newsletters (Previous)

All 10
More vulnerabilities in MailPoet Newsletters (Previous)
SeverityVulnerabilityCVEPublished
Medium5.3Spam Injection
≤2.8.1Update to 2.8.2
CVE-2018-20853
Medium6.5SQL Injection
≤2.7.2Update to 2.7.3
—
Medium6.5Reflected Cross-Site Scripting
≤2.7.2Update to 2.7.3
—
Medium6.1Reflected Cross-Site Scripting
<2.7Update to 2.7
—
Medium6.3Cross-Site Request Forgery
<2.6.11Update to 2.6.11
CVE-2014-3907

Same weakness (Arbitrary File Upload)

All Arbitrary File Upload
Other Arbitrary File Upload 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 critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. 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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