Vulnerability · 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.p
Published Dec 9, 2025 · catalog updated Apr 7, 2026 · OPEN BMCS OpenBMCS
Last checked Oct 27, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2021-47701. EPSS is 0.48%. Act only if a listed version of OPEN BMCS OpenBMCS is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2021-47718 · High
- CVE-2021-47704 · High
- CVE-2021-47703 · Medium
- CVE-2021-47702 · Medium
- Severity
- High8.7
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.48%
- Remediation
- Vendor / distro source
- Affected products
- vendor OPEN BMCS OpenBMCS 2.4
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor OPEN BMCS OpenBMCS 2.42.4
How to fix CVE-2021-47701
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 2.4
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2021-47701. EPSS is 0.48%. Act only if a listed version of OPEN BMCS OpenBMCS is installed.
Which versions are affected?
Compare what you have installed with OPEN BMCS OpenBMCS 2.4 2.4. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.48%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 9, 2025 · EUVD
Detected
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.
Apr 7, 2026 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2021-47701
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2021-47701
30-day exploitation probability 0.48%
first.org - EUVDVulnerability recordEUVD-2021-34738
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/
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- CVE.orgOct 27, 2026
- FIRST EPSSOct 26, 2026
- EUVDOct 26, 2026