CVE-2021-47701 HIGH

CVE-2021-47701: OpenBMCS User Management Privilege Escalation

Vendor Open Bmcs

Product OpenBMCS

Weakness CWE-862 · Missing authorization

Published December 9, 2025

Last update April 7, 2026

View on NVD All CVEs

CVSS base score

8.7/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality —

Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 9, 2025 CVE published

April 7, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2021-47701 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/862.html

Related vulnerabilities

04Related CVE

CVE-2025-66135 WordPress Imager for Elementor plugin <= 2.0.4 - Broken Access Control vulnerability CVE-2022-1511 Missing Authorization in snipe/snipe-it CVE-2026-32439 WordPress BigHearts theme <= 3.1.14 - Broken Access Control vulnerability CVE-2026-25321 WordPress SupportCandy plugin <= 3.4.4 - Broken Access Control vulnerability CVE-2024-12263 Child Theme Creator by Orbisius <= 1.5.5 - Missing Authorization to Authenticated (Subscriber+) Cloud Snippet Update/Delete