CVE-2020-5780

Email Subscribers & Newsletters <= 4.5.5 - Unauthenticated Email Forgery

2020-09-09 00:00
Alex Peña

Strategic Overview

Status
Patched in 4.5.6
Affected Plugin
Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress
Affected Version
< 4.5.6
CVSS
5.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2020-5780
View all Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress vulnerabilities

At a glance

CVE-2020-5780 is a medium-severity Missing Authorization vulnerability in the Email Subscribers & Newsletters WordPress plugin, affecting versions < 4.5.6. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.5.6; sites on affected versions should update now. Disclosed September 2020, reported by Alex Peña.

Vulnerability Overview

Missing Authentication for Critical Function in Icegram Email Subscribers & Newsletters Plugin for WordPress prior to version 4.5.6 allows a remote, unauthenticated attacker to conduct unauthenticated email forgery/spoofing.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Email Subscribers & Newsletters < 4.5.6 takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Email Subscribers & Newsletters the fix is 4.5.6: builds < 4.5.6 are affected, anything from 4.5.6 onward is not.

Remediation

Update to version 4.5.6, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Email Subscribers & Newsletters 4.5.6 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-5780https://www.wordfence.com/threat-intel/vulnerabilities/id/715dc265-253e-4409-b57d-474d3740adbehttps://nvd.nist.gov/vuln/detail/CVE-2020-5780

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C