CVE-2021-47904highCWE-434

CVE-2021-47904: high-severity vulnerability in Phreesoft PhreeBooks

PhreeBooks 5.2.3 - Remote Code Execution

Published 23 Jan 2026 · Updated 28 Jul 2026

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.7%

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Phreesoft · PhreeBooks

References

https://gist.github.com/joswr1ght/22f40787de19d80d110b37fb79ac3985 https://www.exploit-db.com/exploits/46645 https://www.exploit-db.com/exploits/49524 https://www.phreesoft.com/https://www.vulncheck.com/advisories/phreebooks-remote-code-execution