CVE-2021-47703

Name: CVE-2021-47703
Creator: NVD / NIST
Published: 2025-12-09T21:15:49.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2021-47703 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/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

EPSS Probability

0.27%

18.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Openbmcs	Openbmcs	2.4

References

https://www.exploit-db.com/exploits/50670Exploit, Third Party Advisory, VDB Entry
https://www.openbmcs.comProduct
https://www.vulncheck.com/advisories/openbmcs-server-side-request-forgery-ssrf-via-phpqueryphpThird Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5694.phpExploit, Third Party Advisory

Timeline

Published: Dec 9, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-47703?

How severe is CVE-2021-47703?

CVE-2021-47703 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47703?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47703?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST