CVE-2026-90950

Paid Member Subscriptions <= 3.0.0 - Unauthenticated CAPTCHA Bypass

2026-09-21 00:00

Strategic Overview

Status: Patched in 3.1.0
Affected Plugin: Paid Membership Subscriptions – Effortless Memberships, Recurring Payments & Content Restriction
Affected Version: <= 3.0.0
CVSS: 5.3Medium
Weakness type: CWE-804 · Guessable CAPTCHA
CVE: CVE-2026-90950

View all Paid Membership Subscriptions – Effortless Memberships, Recurring Payments & Content Restriction vulnerabilities

At a glance

CVE-2026-90950 is a medium-severity Guessable CAPTCHA vulnerability in the Paid Membership Subscriptions WordPress plugin, affecting versions <= 3.0.0. 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 3.1.0; sites on affected versions should update now. Disclosed September 2026, reported by Naoki Kawahigashi.

Vulnerability Overview

The Paid Membership Subscriptions – Effortless Memberships, Recurring Payments & Content Restriction plugin for WordPress is vulnerable to CAPTCHA Bypass in all versions up to, and including, 3.0.0. This makes it possible for unauthenticated attackers to bypass CAPTCHA on registration forms.

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-804: Guessable CAPTCHA

The product uses a CAPTCHA challenge, but the challenge can be guessed or automatically recognized by a non-human actor.

Remediation

Update to version 3.1.0, 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: Paid Membership Subscriptions 3.1.0 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-90950 https://www.wordfence.com/threat-intel/vulnerabilities/id/4af00f03-200f-4980-82c7-a12d99b51c4f https://nvd.nist.gov/vuln/detail/CVE-2026-90950

Related records

Other vulnerabilities in Paid Membership Subscriptions – Effortless Memberships, Recurring Payments & Content Restriction

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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