ProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename Override

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-16098
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-16 05:16:47 UTC
Updated2026-08-16 05:16:47 UTC
DescriptionThe ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.0.10 via the proSol_handleFileUpload function. This is due to missing validation of the attacker-controlled Content-Disposition header filename, which overrides the allow-listed multipart filename before the file is saved, and a post-save extension check that fails to delete the already-written file. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The nonce required to reach the upload handler is publicly exposed via wp_localize_script on any front-end page rendering the job portal shortcode, allowing unauthenticated visitors to obtain a valid nonce and bypass that gating check entirely.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/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]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Prosolution ProSolution WP Client affected 2.0.10 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.6/includes/UploadHandl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.6/includes/class-proso... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/3c4a7aef-09ec-4d17-87d6-f507d... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.6/includes/UploadHandl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.6/public/class-prosolw... [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: Nir Yehoshua (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-15T16:17:11.000ZDisclosed

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