CVE-2023-2027: The ZM Ajax Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, an

Q: How do I fix CVE-2023-2027?

zm ajax login \& register: upgrade to newer than 2.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2023-2027 being exploited?

CVE-2023-2027 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-2027 affect?

CVE-2023-2027 affects zm ajax login \& register. Severity is critical (CVSS 9.8). The ZM Ajax Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.0.2. This is due to insufficient verification on the user being supplied during a Facebook login through the plugin

Q: How urgent is CVE-2023-2027?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-2027 is a critical-severity flaw (CVSS 9.8) affecting zm ajax login \& register. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ZM Ajax Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.0.2. This is due to insufficient verification on the user being supplied during a Facebook login through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the username.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-288, CWE-287
Published	2023-04-15
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: zm ajax login \& register project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-15 08:15 UTCPublished CVE record published
2026-06-17 05:51 UTCUpdated Record last modified

zm ajax login \& register project zm ajax login \& register UPGRADE

Affected: <= 2.0.2

Fixed in: newer than 2.0.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zm-ajax-login--register || rpm -q zm-ajax-login--register || zm-ajax-login--register --version

2. UPGRADE to newer than 2.0.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zm-ajax-login--register

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zm-ajax-login--register

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-2027?

zm ajax login \& register: upgrade to newer than 2.0.2. Exact commands for each OS are on this page.

Is CVE-2023-2027 being exploited?

CVE-2023-2027 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-2027 affect?

CVE-2023-2027 affects zm ajax login \& register. Severity is critical (CVSS 9.8). The ZM Ajax Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.0.2. This is due to insufficient verification on the user being supplied during a Facebook login through the plugin

How urgent is CVE-2023-2027?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

References

← Back to latest CVEs