CVE-2021-47904
High
Description
PhreeBooks 5.2.3 contains an authenticated file upload vulnerability in the Image Manager that allows remote code execution. Attackers can upload a malicious PHP web shell by exploiting unrestricted file type uploads to gain command execution on the server.
SeverityHigh
CVSS8.8
Exploit probability—
ProductPhreeBooks
PublishedJan 23, 2026
First seenJan 23, 2026
Weakness typeCWE-434Unrestricted upload of dangerous file type
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Phreesoft PhreeBooks | 5.2.3 | — |
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