How severe is CVE-2023-2027?

CVE-2023-2027 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-2027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-2027?

CVE-2023-2027 affects Zm Ajax Login & Register Project Zm Ajax Login & Register. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-2027?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-2027 published?

CVE-2023-2027 was published on 2023-04-15 and last updated on 2026-06-17.

CVE-2023-2027

CVE-2023-2027 is a critical-severity vulnerability in Zm Ajax Login & Register Project Zm Ajax Login & Register with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-288.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-288
Affected product: Zm Ajax Login & Register Project Zm Ajax Login & Register
Published: 2023-04-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-2027?: 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.
How severe is CVE-2023-2027?: CVE-2023-2027 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-2027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-2027?: CVE-2023-2027 affects Zm Ajax Login & Register Project Zm Ajax Login & Register. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-2027?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-2027 published?: CVE-2023-2027 was published on 2023-04-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zm_ajax_login_\&_register_project:zm_ajax_login_\&_register:*:*:*:*:*:wordpress:*:*

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