GHSA-pwg9-vp4w-mc97 · Severity: critical — The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in versions...
The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 2.0.0. This is due to an array validation mismatch where only the first file in the upload array undergoes extension and MIME type validation, while all files are processed and uploaded to a web-accessible directory. This makes it possible for unauthenticated attackers to upload malicious PHP files and achieve remote code execution by sending a valid first file followed by a malicious file.
Conclusion & alert: CVE-2026-6555 is rated Moderate Risk (59.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.95%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.35% | 0.95% | +0.60% |
| 2 | 2026-05-26 | 0.27% | 0.35% | +0.09% |
| 3 | 2026-05-20 | — | 0.27% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
GHSA-pwg9-vp4w-mc97 · Severity: critical — The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in versions...
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||