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CVE-2023-2027

29
FAUCET Score

CVE-2023-2027 is a critical authentication bypass vulnerability affecting the ZM Ajax Login & Register plugin for WordPress, specifically versions up to and including 2.0.2. This flaw allows unauthenticated attackers to log in as any existing user, including administrators, by exploiting insufficient verification during Facebook logins if they know the target username. With a CVSS score of 9.8 (Critical), this vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.0.2CPE matchmatch criteria
cpe:2.3:a:zm_ajax_login_\&_register_project:zm_ajax_login_\&_register:*:*:*:*:*:wordpress:*:*
>= 0, <= 2.0.2CPE match
cpe:2.3:a:zanematthew:zm_ajax_login_\&_register:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 44th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

plugins.trac.wordpress.org / browser/zm-ajax-login-register/trunk/src/ALRSocial/ALRSocialFacebook.php
Broken Link
wordfence.com / threat-intel/vulnerabilities/id/b10d01ec-54ef-456b-9410-ed013343a962
Third Party Advisory