CVE-2021-47701

HIGH

OpenBMCS 2.4 - Privilege Escalation via User Permissions Update Script

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47701. PoCs published by LiquidWorm.

AI-analyzed exploit summary This exploit demonstrates a privilege escalation vulnerability in OpenBMCS 2.4, allowing a regular user to elevate their permissions or create administrative users via HTTP POST requests to specific PHP scripts.

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.

Exploits (1)

exploitdb WORKING POC
by LiquidWorm · textwebappsphp
https://www.exploit-db.com/exploits/50669

This exploit demonstrates a privilege escalation vulnerability in OpenBMCS 2.4, allowing a regular user to elevate their permissions or create administrative users via HTTP POST requests to specific PHP scripts.

Classification
Working Poc 100%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: OpenBMCS 2.4
Auth required
Prerequisites: Valid user session (PHPSESSID) · Access to the target application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory, VDB Entry exploit
https://www.exploit-db.com/exploits/50669
Exploit, Third Party Advisory third-party-advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php

Scores

CVSS v3 8.8
EPSS 0.0041
EPSS Percentile 32.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (2)
OPEN BMCS/OpenBMCS 2.4
openbmcs/openbmcs 2.4
Published Dec 09, 2025
Tracked Since Feb 18, 2026