Description
The Check & Log Email WordPress plugin before 2.0.13 does not properly handle email replacement, which could allow unauthenticated users to perform Stored XSS attacks when the email encoder setting is enabled
Published: 2026-04-28
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Stored Cross‑Site Scripting (XSS) via the Check & Log Email WordPress plugin
Action: Update Plugin
AI Analysis

Impact

The Check & Log Email plugin fails to properly sanitize or encode email replacement content when the email encoder setting is active, allowing an unauthenticated user to inject malicious script data that is stored in the database and executed when a user later views a page. This stored XSS flaw can be used to hijack user sessions, deface pages, or deliver malware to site visitors.

Affected Systems

Any WordPress site running the Check & Log Email plugin version earlier than 2.0.13 is affected. No operating‑system or WordPress core exclusions are specified.

Risk and Exploitability

The CVSS score for this vulnerability is 5.4, while the EPSS score is less than 1 %. It is not listed in the CISA KEV catalog. Exploitation requires no authentication and relies solely on the public email replacement interface of the plugin. Because the payload is stored and served to all users, an attacker can impact the entire audience of the affected WordPress site.

Generated by OpenCVE AI on April 29, 2026 at 01:29 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade the Check & Log Email plugin to version 2.0.13 or later
  • If upgrading is not immediately possible, locate the email encoder setting within the plugin’s administration panel and disable it to block stored XSS
  • If the plugin cannot be updated or reconfigured, temporarily remove or deactivate the Check & Log Email plugin until a secure version is installed

Generated by OpenCVE AI on April 29, 2026 at 01:29 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 29 Apr 2026 01:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Tue, 28 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Tue, 28 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 28 Apr 2026 12:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Tue, 28 Apr 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Checkmail
Checkmail check And Log Email
Wordpress
Wordpress wordpress
Vendors & Products Checkmail
Checkmail check And Log Email
Wordpress
Wordpress wordpress

Tue, 28 Apr 2026 06:30:00 +0000

Type Values Removed Values Added
Description The Check & Log Email WordPress plugin before 2.0.13 does not properly handle email replacement, which could allow unauthenticated users to perform Stored XSS attacks when the email encoder setting is enabled
Title Check & Log Email < 2.0.13 - Unauthenticated Stored XSS
References

Subscriptions

Checkmail Check And Log Email
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-04-28T14:14:55.661Z

Reserved: 2026-04-01T08:45:45.786Z

Link: CVE-2026-5306

cve-icon Vulnrichment

Updated: 2026-04-28T14:14:50.080Z

cve-icon NVD

Status : Deferred

Published: 2026-04-28T07:16:03.617

Modified: 2026-04-28T20:13:21.737

Link: CVE-2026-5306

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-29T01:30:06Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')