Does CL Simplest SMTP have any unpatched vulnerabilities?

No. All known vulnerabilities in CL Simplest SMTP have been patched as of the latest data update. Always keep the plugin updated to the latest version.

Is CL Simplest SMTP compatible with WordPress 6.9.4?

According to WordPress.org data, CL Simplest SMTP 1.2.3 has been tested up to WordPress 6.9.4. Check the plugin's changelog for the latest compatibility information.

Is CL Simplest SMTP compatible with PHP 7.4+?

CL Simplest SMTP requires PHP 7.4 or higher. Most modern WordPress hosts run PHP 8.1 or 8.2. If you are on an older PHP version, consider upgrading before installing this plugin.

How often is CL Simplest SMTP updated?

CL Simplest SMTP was last updated on Feb 25, 2026. Frequent updates are generally a positive security signal.

What is CL Simplest SMTP's security score?

CL Simplest SMTP has a WP-Safety security score of 100/100. This score is computed from CVE history, patch response time, developer trust signals, and plugin maintenance activity.

CL Simplest SMTP Security & Risk Analysis

wordpress.org/plugins/cl-simplest-smtp

Send mails throught SMTP server. Simplest option to send mail when hosting or server do not permits send mail or is missconfigured.

20 active installs v1.2.3 PHP 7.4+ WP 5.0+ Updated Feb 25, 2026

debugmailsmtpsystem

A · Safe

CVEs total0

Unpatched0

Last CVENever

Plugin page Download

Safety Verdict

Is CL Simplest SMTP Safe to Use in 2026?

Generally Safe

Score 100/100

CL Simplest SMTP has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.

No known CVEs Updated 1mo ago

Risk Assessment

The 'cl-simplest-smtp' plugin v1.2.3 exhibits a generally strong security posture based on the provided static analysis. The absence of any recorded CVEs, critical or high-severity taint flows, direct SQL queries, or a significant attack surface with unprotected entry points are all positive indicators. The plugin also demonstrates good practices in output escaping and utilizes nonce checks and capability checks, which are crucial for preventing common WordPress vulnerabilities.

Key Concerns

Minor unescaped output detected
File operations present without explicit detail

Vulnerabilities

None known

CL Simplest SMTP Security Vulnerabilities

No known vulnerabilities — this is a good sign.

Code Analysis

Analyzed Mar 16, 2026

CL Simplest SMTP Code Analysis

Dangerous Functions

Raw SQL Queries

0 prepared

Unescaped Output

69 escaped

Nonce Checks

Capability Checks

File Operations

External Requests

Bundled Libraries

Output Escaping

87% escaped79 total outputs

Data Flows

All sanitized

Data Flow Analysis

3 flows

handle_log_deletion (includes\cl-simplest-functions.php:448)

Source (user input) Sink (dangerous op) Sanitizer Transform Unsanitized Sanitized

Attack Surface

CL Simplest SMTP Attack Surface

Entry Points0

Unprotected0

WordPress Hooks 7

actionplugins_loadedcl-simplest-smtp.php:53

actionphpmailer_initcl-simplest-smtp.php:63

actionadmin_noticescl-simplest-smtp.php:65

actionadmin_enqueue_scriptscl-simplest-smtp.php:81

actionadmin_menuincludes\cl-simplest-functions.php:105

actionadmin_initincludes\cl-simplest-functions.php:113

actionadmin_initincludes\cl-simplest-functions.php:515

Maintenance & Trust

CL Simplest SMTP Maintenance & Trust

Maintenance Signals

WordPress version tested6.9.4

Last updatedFeb 25, 2026

PHP min version7.4

Downloads2K

Community Trust

Rating100/100

Number of ratings4

Active installs20

Alternatives

CL Simplest SMTP Alternatives

Simple Email Sender

simple-email-sender-with-smtp-and-debugging

A simple plugin to send emails from WordPress admin panel using SMTP, with enhanced debugging features.

10 No CVEs

WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin

wp-mail-smtp

Make email delivery easy for WordPress. Connect with SMTP, Gmail, Outlook, SendGrid, Mailgun, SES, Zoho, + more. Rated #1 WordPress SMTP Email plugin.

4.0M 2 CVEs

Easy WP SMTP – WordPress SMTP and Email Logs: Gmail, Office 365, Outlook, Custom SMTP, and more

easy-wp-smtp

Make SMTP email sending and delivery easy. Configure Gmail, Outlook, Brevo, SendGrid, Mailgun, SendLayer or connect to any SMTP server.

500K 8 CVEs

FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider

fluent-smtp

The Ultimate Forever Free Mail SMTP Plugin for WordPress. Connect with any SMTP, SendGrid, Mailgun, Amazon SES, Brevo, Postmark, Sparkpost, Google...

500K 5 CVEs

GoSMTP – SMTP for WordPress

gosmtp

100

Send emails from your WordPress site using your preferred SMTP provider like Gmail, Outlook, AWS, Zoho, SMTP.com, Brevo (formerly Sendinblue), Mailgun …

500K No CVEs

Developer Profile

CL Simplest SMTP Developer Profile

Carlos Longarela

2 plugins · 120 total installs

trust score

Avg Security Score

100/100

Avg Patch Time

30 days

View full developer profile

Detection Fingerprints

How We Detect CL Simplest SMTP

Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.

Asset Fingerprints

Asset Paths

/wp-content/plugins/cl-simplest-smtp/assets/css/smtp-styles.css/wp-content/plugins/cl-simplest-smtp/assets/js/smtp-scripts.js

Script Paths

assets/js/smtp-scripts.js

Version Parameters

cl-simplest-smtp/assets/css/smtp-styles.css?ver=cl-simplest-smtp/assets/js/smtp-scripts.js?ver=

HTML / DOM Fingerprints

FAQ