Auth bypass in Open Bmcs Openbmcs
CVE-2021-47701
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 requ…
Vulnerability class: Broken Access Control
EPSS: 0.004 (33.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Open Bmcs Openbmcs — versions 2.4
- Openbmcs — versions 2.4
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, VDB Entry, Third Party Advisory, exploit)
- disclosure@vulncheck.com (Exploit, Third Party Advisory, third-party-advisory)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47701?
- CVE-2021-47701 is a high-severity vulnerability in Open Bmcs Openbmcs, classified under Missing Authorization. CVSS score: 8.8/10. Published 2025-12-09.
- How severe is CVE-2021-47701?
- High severity. CVSS v3 base score is 8.8 out of 10.