CVE-2026-16098 json
ProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename Override
published 2026-08-16 2 mo ago modified 2026-08-20 2 mo ago also EUVD-2026-59855
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
The 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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
1.20% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- prosolution ProSolution WP Client
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/3c4a7aef-09ec-4d17-87d6-f507d64e0afa?source=cve
- plugins.trac.wordpress.org /browser/prosolution-wp-client/tags/2.0.6/includes/UploadHandler.php#L1090
- plugins.trac.wordpress.org /browser/prosolution-wp-client/tags/2.0.6/includes/UploadHandler.php#L1327
- plugins.trac.wordpress.org /browser/prosolution-wp-client/tags/2.0.6/public/class-prosolwpclient-public.php#L1033
- plugins.trac.wordpress.org /browser/prosolution-wp-client/tags/2.0.6/includes/class-prosolwpclient.php#L254
- plugins.trac.wordpress.org /changeset?reponame=&old=3644463%40prosolution-wp-client&new=3644463%40prosolution-wp-client
Sources
- CVE List CVE-2026-16098
- NVD CVE-2026-16098
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.