CVE-2021-47718Public exploitNetwork attack vector

Unauthenticated file disclosure via directory indexes

Published Dec 9, 2025 · Updated Apr 7, 2026

Information disclosure in OPEN BMCS OpenBMCS 2.4 allows remote attackers to access sensitive files through unauthenticated directory listings. Directory requests to /debug/ and /php/ return generated indexes instead of denying access, exposing scripts and configuration-bearing paths. No account or user interaction is required; disclosed configuration data and database credentials can enable full BMS access.

CVSS severity8.7
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in OPEN BMCS OpenBMCS 2.4 allows remote attackers to access sensitive files through unauthenticated directory listings. Directory requests to /debug/ and /php/ return generated indexes instead of denying access, exposing scripts and configuration-bearing paths. No account or user interaction is required; disclosed configuration data and database credentials can enable full BMS access.

The record

CVE
CVE-2021-47718
Published
Dec 9, 2025
Updated
Apr 7, 2026
Vendor
OPEN BMCS
Product
OpenBMCS
Classifications
CWE-548, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OPEN BMCS · OpenBMCSversion=2.4

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-548Exposure of Information Through Directory Listing
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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