WP Users Masquerade <= 2.0.0 - Authenticated (Subscriber+) Authentication Bypass

published 2024-10-10 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-49985

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

The WP Users Masquerade plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.0.0. This is due to incorrect authentication and capability checking in the 'ajax_masq_login' function. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to log in as any existing user on the site, such as an administrator.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-10-10)

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

lagunaisw WP Users Masquerade
lagunaisw wp_users_masquerade

Classification

Weakness

CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-306 Missing Authentication for Critical Functionality

Technology feeds

WordPress rss critical rss

References

Sources

CVE List CVE-2024-9522
NVD CVE-2024-9522

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary