Security readout for executives and security teams
Plain-English summary
CVE-2021-47701 lets a low-privileged OpenBMCS 2.4 user promote themselves to administrator through the user-management plugin. For organizations using OpenBMCS, this could lead to full control of the application and its managed data. Public exploit information exists, but the provided sources do not show confirmed active exploitation.
Executive priority
Treat as high priority if OpenBMCS 2.4 is in use. The risk is privilege escalation from a basic account to administrator, with public exploit information available. If OpenBMCS is not deployed, business urgency is low.
Technical view
OpenBMCS 2.4 is affected by a CWE-862 authorization weakness in update_user_permissions.php under /plugins/useradmin/. A read-level authenticated user can manipulate permission updates through HTTP POST requests and gain admin privileges. CVSS v4 score is 8.7, reflecting network access, low complexity, low privileges, and high impact to application confidentiality, integrity, and availability.
Likely exposure
Exposure appears limited to organizations running OpenBMCS 2.4, especially where authenticated read users can access the useradmin plugin over a network. The source bundle lists other versions as unaffected by default, but local asset validation is required.
Exploitation context
ExploitDB and Zero Science Lab publish exploit-oriented details, indicating the issue is publicly documented. CISA KEV status is not indicated, and no provided source confirms active exploitation in the wild.
Researcher notes
Sources identify OpenBMCS 2.4 and update_user_permissions.php in /plugins/useradmin/ as the affected component. The CVE record lists CWE-862 and CVSS 4.0 score 8.7. No source in the bundle names a patch, fixed version, or active exploitation status.
Mitigation direction
- Identify any OpenBMCS 2.4 deployments and prioritize review.
- Check OpenBMCS or maintainer guidance for fixed versions or official mitigations.
- Restrict access to OpenBMCS administration interfaces to trusted networks.
- Review and minimize read-user accounts until remediation is complete.
- Monitor OpenBMCS logs for unexpected permission or role changes.
- Consider disabling exposed user-management functionality if business-safe and vendor-supported.
Validation and detection
- Confirm whether OpenBMCS 2.4 is installed in production or test environments.
- Inventory users with read-level access to OpenBMCS.
- Review role-change history for unauthorized admin promotions.
- Verify whether /plugins/useradmin/ is reachable by non-admin authenticated users.
- Check vendor or maintainer sources for update availability.
- Document compensating controls if immediate remediation is unavailable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47701 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50669CVE reference · exploit
- Zero Science Lab Disclosure (ZSL-2022-5693)CVE reference · third-party-advisory
- VulnCheck Advisory: OpenBMCS User Management Privilege EscalationCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.