Vulnerability · Published Dec 9, 2025 · Assigned by VulnCheck
CVE-2021-47701OpenBMCS User Management Privilege Escalation
High 8.7
In plain English
A high-severity missing authorization in OpenBMCS from OPEN BMCS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.5%top 58.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 products (as reported)
Weakness: CWE-862 · 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
References
- ExploitDB-50669 exploit
- Zero Science Lab Disclosure (ZSL-2022-5693) third-party-advisory
- VulnCheck Advisory: OpenBMCS User Management Privilege Escalation third-party-advisory