ProSolution WP Client <= 1.9.9 - Unauthenticated Arbitrary File Upload via proSol_fileUploadProcess
Priority MEDIUM 50CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
The ProSolution WP Client plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'proSol_fileUploadProcess' function in all versions up to, and including, 1.9.9. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00601 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| prosolution | ProSolution WP Client | up to 1.9.9 | — | No fix listed | CNA |
- ProSolution WP Client Vendorprosolution Affected up to 1.9.9 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2942
- 2026-10-03 Alias added: GHSA-58qw-hm39-96q8
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Other 3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3852aef6-42e7-4b71-a1ba-dd41284fd07b?source=cve
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/public/class-prosolwpclient-public.php?rev=3331282#L993
- https://plugins.trac.wordpress.org/changeset/3484577/prosolution-wp-client
More prosolution vulnerabilities
- TI-2026-13476 ProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename Override CVSS 3.1CRITICAL 9.8
- TI-2026-05745 ProSolution WP Client <= 2.0.0 - Unauthenticated Arbitrary File Upload via 'files' CVSS 3.1CRITICAL 9.8
- TI-2026-12259 ProSolution WP Client <= 2.0.8 - Unauthenticated Arbitrary File Deletion via 'newfilename' and 'filename' Parameters CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-2942 · CVE Program
- CVE-2026-2942 · NVD
- FIRST EPSS
- GHSA-58qw-hm39-96q8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences