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 request to PHP scripts in '/plugins/useradmin/' directory.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.exploit-db.com/exploits/50669	Exploit Third Party Advisory VDB Entry
https://www.vulncheck.com/advisories/openbmcs-user-management-privilege-escalation	Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openbmcs:openbmcs:2.4:*:*:*:*:*:*:*

History

17 Dec 2025, 14:14

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8
CPE		cpe:2.3:a:openbmcs:openbmcs:2.4:::::::*
References	~~() https://www.exploit-db.com/exploits/50669 -~~	() https://www.exploit-db.com/exploits/50669 - Exploit, Third Party Advisory, VDB Entry
References	~~() https://www.vulncheck.com/advisories/openbmcs-user-management-privilege-escalation -~~	() https://www.vulncheck.com/advisories/openbmcs-user-management-privilege-escalation - Third Party Advisory
References	~~() https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php -~~	() https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php - Exploit, Third Party Advisory
First Time		Openbmcs openbmcs Openbmcs

09 Dec 2025, 21:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-09 21:15

Updated : 2025-12-17 14:14

NVD link : CVE-2021-47701

Mitre link : CVE-2021-47701

CVE.ORG link : CVE-2021-47701

JSON object : View

Products Affected

openbmcs

openbmcs

CWE

CWE-862

Missing Authorization

{"id": "CVE-2021-47701", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-12-09T21:15:47.860", "references": [{"url": "https://www.exploit-db.com/exploits/50669", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/openbmcs-user-management-privilege-escalation", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php", "tags": ["Exploit", "Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2025-12-17T14:14:10.987", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openbmcs:openbmcs:2.4:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E3963F28-1F3E-488E-A815-FA0BD370105D"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}