CVE-2026-107579

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579

Progressive Robot hMailServer versions 6.3.4 and 6.3.5 are vulnerable to a high-severity denial-of-service (DoS) condition due to inefficient algorithmic complexity in bounce and complaint processing. When bounce processing, complaint processing, or mailing list management is enabled, an unauthen...

EUVD-2026-94861

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-16268

The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts...

PT-2026-68398

Name of the Vulnerable Software and Affected Versions Newsletters WordPress plugin versions prior to 4.16 Description An issue exists where the plugin fails to authenticate or validate bounce-processing requests before fetching a user-supplied URL on the server side. This allows unauthenticated...

CVE-2026-16268: Server-Side Request Forgery (SSRF)

The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts...