How severe is CVE-2021-47703?

CVE-2021-47703 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-47703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47703?

CVE-2021-47703 affects Openbmcs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47703?

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-2021-47703 have an EU (EUVD) identifier?

Yes. CVE-2021-47703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34736.

When was CVE-2021-47703 published?

CVE-2021-47703 was published on 2025-12-09 and last updated on 2026-06-17.

CVE-2021-47703

CVE-2021-47703 is a high-severity vulnerability in Openbmcs with a CVSS 3.x base score of 7.2. 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-918.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v4: 6.9
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34736
Weakness: CWE-918
Affected product: Openbmcs
Published: 2025-12-09
Last modified: 2026-06-17

Description

OpenBMCS 2.4 contains an unauthenticated SSRF vulnerability that allows attackers to bypass firewalls and initiate service and network enumeration on the internal network through the affected application, allowing hijacking of current sessions. Attackers can specify an external domain in the 'ip' parameter to force the application to make an HTTP request to an arbitrary destination host.

Frequently asked questions

What is CVE-2021-47703?: OpenBMCS 2.4 contains an unauthenticated SSRF vulnerability that allows attackers to bypass firewalls and initiate service and network enumeration on the internal network through the affected application, allowing hijacking of current sessions. Attackers can specify an external domain in the 'ip' parameter to force the application to make an HTTP request to an arbitrary destination host.
How severe is CVE-2021-47703?: CVE-2021-47703 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-47703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47703?: CVE-2021-47703 affects Openbmcs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47703?: 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-2021-47703 have an EU (EUVD) identifier?: Yes. CVE-2021-47703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34736.
When was CVE-2021-47703 published?: CVE-2021-47703 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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