CVE-2021-47702Public exploitNetwork attack vector

Administrative email sending via unchecked cross-site request

Published Dec 9, 2025 · Updated Apr 7, 2026

Cross-site request forgery in OpenBMCS 2.4 allows remote attackers to send email as an administrator through a crafted web page. The core/sendFeedback.php handler accepts subject, message, and email fields in a POST request without validating that the request originated from the authenticated interface. Exploitation requires a logged-in user to visit an attacker-controlled site, after which the browser submits the request with that user's session privileges.

CVSS severity4.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in OpenBMCS 2.4 allows remote attackers to send email as an administrator through a crafted web page. The core/sendFeedback.php handler accepts subject, message, and email fields in a POST request without validating that the request originated from the authenticated interface. Exploitation requires a logged-in user to visit an attacker-controlled site, after which the browser submits the request with that user's session privileges.

The record

CVE
CVE-2021-47702
Published
Dec 9, 2025
Updated
Apr 7, 2026
Vendor
OPEN BMCS
Product
OpenBMCS
Classifications
CWE-352, CAPEC-62, T1204.001
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

4.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001User Execution: Malicious Link

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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