CVE-2021-47701 - CVE House
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Status published High CVE-2021-47701

OpenBMCS User Management Privilege Escalation

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • LiquidWorm as Gjoko Krstic of Zero Science Lab

References

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CVE-2021-47703
OpenBMCS Server Side Request Forgery (SSRF) via /php/query.php
Medium 6.9
CVE-2021-47702
OpenBMCS Cross Site Request Forgery (CSRF) via sendFeedback.php
Medium 5.3

Affected Vendor

Affected Software

OpenBMCS
Vulnerable Versions:
2.4

Timeline

Official Publish: December 9th, 2025
Last Modified: April 7th, 2026
Added to House: July 21st, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-862

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1078 Valid Accounts
Persistence
T1531 Account Access Removal
Impact