CVE-2026-4977 json
UsersWP <= 1.2.58 - Authenticated (Subscriber+) Restricted Usermeta Modification via 'htmlvar' Parameter
published 2026-04-10 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-21266
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
The UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WordPress is vulnerable to Improper Access Control in all versions up to, and including, 1.2.58 This is due to insufficient field-level permission validation in the upload_file_remove() AJAX handler where the $htmlvar parameter is not validated against a whitelist of allowed fields or checked against the field's for_admin_use property. This makes it possible for authenticated attackers, with subscriber-level access and above, to clear or reset any restricted usermeta column for their own user record, including fields marked as "For admin use only", bypassing intended field-level access restrictions.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- stiofansisland UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/efee685c-e2cd-471b-aea9-607124df6006?source=cve
- plugins.trac.wordpress.org /browser/userswp/trunk/includes/class-forms.php#L2274
- plugins.trac.wordpress.org /browser/userswp/tags/1.2.54/includes/class-forms.php#L2274
- plugins.trac.wordpress.org /browser/userswp/trunk/includes/class-forms.php#L2251
- plugins.trac.wordpress.org /browser/userswp/tags/1.2.54/includes/class-forms.php#L2251
- plugins.trac.wordpress.org /browser/userswp/trunk/includes/class-meta.php#L165
- plugins.trac.wordpress.org /browser/userswp/tags/1.2.54/includes/class-meta.php#L165
- plugins.trac.wordpress.org /changeset?old_path=%2Fuserswp/tags/1.2.58&new_path=%2Fuserswp/tags/1.2.59
Sources
- CVE List CVE-2026-4977
- NVD CVE-2026-4977
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.