One User Avatar | User Profile Picture <= 2.5.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via wpua-file Parameter

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18983
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 05:16:42 UTC
Updated2026-08-28 15:09:00 UTC
DescriptionThe One User Avatar | User Profile Picture plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.5.4 via the wpua_action_process_option_update function. This is due to insufficient file type validation in wp_handle_upload() called without a MIME allow-list, with post-write validation relying on the attacker-controlled client-supplied Content-Type header rather than a server-derived type, and no cleanup of files that fail the check. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. in order to exploit this vulnerability an admin has to give subscribers permission to upload avatars. While PHP files and svg files are rejected, dxfp files are accepted.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-434 | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Onedesigns One User Avatar User Profile Picture affected 2.5.4 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/f413b610-839a-4a93-aec5-b6566... [email protected] www.wordfence.com
plugins.trac.wordpress.org/changeset/3659509/one-user-avatar/trunk/includes/class-wp-use... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/one-user-avatar/trunk/includes/class-wp-user-avatar.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/one-user-avatar/trunk/includes/class-wp-user-avatar.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/one-user-avatar/trunk/includes/class-wp-user-avatar.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Dthangws (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-06T14:13:18.000ZVendor Notified
CNA2026-08-27T15:22:38.000ZDisclosed

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