PT-2026-4517 · Unknown · Phreebooks

Kr0Ff · Published 2026-01-23 · Updated 2026-01-24 · CVE-2021-47904

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions PhreeBooks version 5.2.3

Description PhreeBooks version 5.2.3 has a flaw in the Image Manager related to file uploads. An authenticated attacker can upload a malicious PHP web shell due to unrestricted file type uploads, potentially leading to remote code execution on the server. The vulnerable component is the Image Manager. The attack involves uploading a malicious PHP web shell.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-47904

Affected Products

Phreebooks

References · 8

• 🔥 https://exploit-db.com/exploits/49524 · Exploit
• 🔥 https://exploit-db.com/exploits/46645 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47904 · Security Note
• https://vulncheck.com/advisories/phreebooks-remote-code-execution · Note
• https://phreesoft.com · Note
• https://twitter.com/CVEnew/status/2014995829912969641 · Twitter Post
• https://gist.github.com/joswr1ght/22f40787de19d80d110b37fb79ac3985 · Note
• https://t.me/CVEtracker/42865 · Telegram Post