How severe is CVE-2021-47701?

CVE-2021-47701 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-47701 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47701?

CVE-2021-47701 affects Openbmcs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47701?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2021-47701 have an EU (EUVD) identifier?

Yes. CVE-2021-47701 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34738.

When was CVE-2021-47701 published?

CVE-2021-47701 was published on 2025-12-09 and last updated on 2026-06-17.

CVE-2021-47701

CVE-2021-47701 is a high-severity vulnerability in Openbmcs with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34738
Weakness: CWE-862
Affected product: Openbmcs
Published: 2025-12-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-47701?: CVE-2021-47701 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-47701 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47701?: CVE-2021-47701 affects Openbmcs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47701?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2021-47701 have an EU (EUVD) identifier?: Yes. CVE-2021-47701 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34738.
When was CVE-2021-47701 published?: CVE-2021-47701 was published on 2025-12-09 and last updated on 2026-06-17.

References

Affected products (1)

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

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