CVE-2026-8293

Really Simple Security <= 9.5.10.0 - Two Factor Authentication Bypass

2026-06-12 00:00
John Umoru

Strategic Overview

Status
Patched in 9.5.10.1
Affected Plugin
Really Simple Security – Simple and Performant Security (formerly Really Simple SSL)
Affected Version
<= 9.5.10.0
CVSS
5.3Medium
Weakness type
CWE-287 · Improper Authentication
CVE
CVE-2026-8293
View all Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) vulnerabilities

At a glance

CVE-2026-8293 is a medium-severity Improper Authentication vulnerability in the Really Simple Security WordPress plugin, affecting versions <= 9.5.10.0. 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 9.5.10.1; sites on affected versions should update now. Disclosed June 2026, reported by John Umoru.

Vulnerability Overview

The Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) plugin for WordPress is vulnerable to Two Factor Authentication Bypass in all versions up to, and including, 9.5.10.0. This makes it possible for unauthenticated attackers to bypass the second factor of authentication when the first is known.

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-287: Improper Authentication

Reaching this weakness in Really Simple Security <= 9.5.10.0 takes a caller who can reach the endpoint. Improper authentication means the mechanism that proves who a caller is can be satisfied without the secret it was supposed to require.

An attacker authenticates as another user — administrators included — without ever knowing a password, so password policies and login rate limits never come into play. For Really Simple Security the fix is 9.5.10.1: builds <= 9.5.10.0 are affected, anything from 9.5.10.1 onward is not.

Remediation

Update to version 9.5.10.1, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Really Simple Security 9.5.10.1 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-8293https://www.wordfence.com/threat-intel/vulnerabilities/id/2bbc1a85-013c-4a61-86a8-54b823ffdfb1https://nvd.nist.gov/vuln/detail/CVE-2026-8293

Related records

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