Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>) a different solution is required such as the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23 3.6.13 3.7.9 3.8.4 or 3.9.

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SMTP Smuggling Enabling Spoofed Emails to Evade Authentication Protocols

Summary: A new email spoofing technique called "SMTP Smuggling" lets attackers send emails from fake addresses, bypassing security checks. This trick works by abusing how different servers handle line endings in email messages. The attack could affect millions of email users, so updating your...

Exploit for Insufficient Verification of Data Authenticity in Postfix

CVE-2023-51764 CVE-2023-51764 poc Link...

WordPress Post SMTP Plugin <= 2.8.6 is vulnerable to Broken Access Control

Software Post SMTP Type Plugin Vulnerable versions = 2.8.6 Fixed in 2.8.7 OWASP Top 10 A1: Broken Access Control Classification Broken Access Control CVE CVE-2023-52233 Patch priority High CVSS severity High 8.6 Developer WPExperts PSID f3a17f385c15 Credits Yuchen Ji Required privilege...

openSUSE 15 Security Update : exim (openSUSE-SU-2024:0007-1)

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2024:0007-1 advisory. - A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The...

Exim < 4.97.1 SMTP smuggling

Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports . but...

OPENSUSE-SU-2024:0007-1 Security update for exim

This update for exim fixes the following issues: exim was updated to 4.97.1 boo1218387, CVE-2023-51766: Fixes for the smtp protocol smuggling CVE-2023-51766 exim was updated to exim 4.96: Move from using the pcre library to pcre2. Constification work in the filters module required a major version...

SMTP Smuggling: New Flaw Lets Attackers Bypass Security and Spoof Emails

A new exploitation technique called Simple Mail Transfer Protocol SMTP smuggling can be weaponized by threat actors to send spoofed emails with fake sender addresses while bypassing security measures. "Threat actors could abuse vulnerable SMTP servers worldwide to send malicious emails from...

Cross site scripting

The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin...

CVE-2023-6621 Post SMTP < 2.8.7 - Reflected Cross-Site Scripting

The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin...

CVE-2023-6621 Post SMTP < 2.8.7 - Reflected Cross-Site Scripting

The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin...

CVE-2023-6621

The CVE-2023-6621 entry applies to the WordPress Post SMTP plugin (versions before 2.8.7). Root cause: the msg parameter is not sanitized/escaped before echoing back on the page, causing a Reflected Cross-Site Scripting vulnerability. Impact: could affect high-privilege users such as admins; CVSS...

CVE-2023-6621 Post SMTP < 2.8.7 - Reflected Cross-Site Scripting

The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin...

CVE-2023-6629

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘msg’ parameter in all versions up to, and including, 2.8.6 due to insufficient input sanitization and output escaping. Th...

Cross site scripting

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘device’ header in all versions up to, and including, 2.8.7 due to insufficient input sanitization and output escaping. This...

CVE-2023-7027 POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Unauthenticated Stored Cross-Site Scripting via device

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘device’ header in all versions up to, and including, 2.8.7 due to insufficient input sanitization and output escaping. This...

CVE-2023-6629 POST SMTP Mailer <= 2.8.6 - Reflected Cross-Site Scripting via msg

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘msg’ parameter in all versions up to, and including, 2.8.6 due to insufficient input sanitization and output escaping. Th...

CVE-2023-6629 POST SMTP Mailer <= 2.8.6 - Reflected Cross-Site Scripting via msg

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘msg’ parameter in all versions up to, and including, 2.8.6 due to insufficient input sanitization and output escaping. Th...

WordPress Plugin Post SMTP Cross-Site Scripting Vulnerability

WordPress and WordPress plugin are both products of the WordPress Foundation.WordPress is a blogging platform developed using the PHP language. WordPress is a blogging platform developed in the PHP language that supports personal blogs on PHP and MySQL servers.WordPress plugin is an application...

WordPress Post SMTP Plugin <= 2.8.6 is vulnerable to Cross Site Scripting (XSS)

Software Post SMTP Type Plugin Vulnerable versions = 2.8.6 Fixed in 2.8.7 OWASP Top 10 A7: Cross-Site Scripting XSS Classification Cross Site Scripting XSS CVE CVE-2023-6629 Patch priority Medium CVSS severity Medium 7.1 Developer WPExperts PSID 5ffadd1b9885 Credits Matan Berson matanber Required...