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CVE-2021-47701

HIGH
8.8
CVSS Severity Score
EPSS Score0.1420%
EPSS Percentile43.41th
PublishedDec 9, 2025
Last ModifiedDec 17, 2025

Vulnerability Description

OpenBMCS 2.4 allows an attacker to escalate privileges from a read user to an admin user by manipulating permissions and exploiting a vulnerability in the update_user_permissions.php script. Attackers can submit a malicious HTTP POST request to PHP scripts in '/plugins/useradmin/' directory.

Affected Platforms (CPE)

📦
Openbmcs

Openbmcs

= 2.4

References & Advisories

🔗 https://www.exploit-db.com/exploits/50669
🔗 https://www.vulncheck.com/advisories/openbmcs-user-management-privilege-escalation
🔗 https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php

Related Vulnerabilities

CVE-2021-3929610.0

In OpenBMC 2.9, crafted IPMI messages allow an attacker to bypass authentication and gain full control of the system.

CVE-2019-41699.1

IBM Open Power Firmware OP910 and OP920 could allow access to BMC via IPMI using default OpenBMC password even after BMC password ...

CVE-2020-141568.8

user_channel/passwd_mgr.cpp in OpenBMC phosphor-host-ipmid before 2020-04-03 does not ensure that /etc/ipmi-pass has strong file p...

CVE-2021-389607.5

IBM OPENBMC OP920, OP930, and OP940 could allow an unauthenticated user to obtain sensitive information. IBM X-Force ID: 212047.

CVE-2021-47701 Detail & Impact Analysis | CVSS 8.8 (HIGH) | Cyber-Sec.Space | Cyber-Sec.Space