CVE-2021-29004Public exploitNetwork attack vector

Authenticated webshell upload via injectable rid parameter

Published Oct 11, 2021 · Updated Jul 9, 2026

SQL injection in rConfig 3.9.6 allows remote authenticated users to execute database queries through the web interface. The lib/ajaxHandlers/ajaxDownloadNow.php endpoint accepts the rid query parameter in a form that sqlmap can inject. Writing a remotely accessible webshell requires rConfig and MySQL to share a host and MySQL's --secure-file-priv restriction to be unset.

CVSS severity8.8
High
EPSS probability2.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in rConfig 3.9.6 allows remote authenticated users to execute database queries through the web interface. The lib/ajaxHandlers/ajaxDownloadNow.php endpoint accepts the rid query parameter in a form that sqlmap can inject. Writing a remotely accessible webshell requires rConfig and MySQL to share a host and MySQL's --secure-file-priv restriction to be unset.

The record

CVE
CVE-2021-29004
Published
Oct 11, 2021
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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