CVE-2021-40617Public exploitNetwork attack vector

SQL injection via unsanitized username parameter

Published Oct 11, 2021 · Updated Apr 16, 2025

SQL injection in ForgotPassUserName.php in openSIS Community Edition 8.0 allows attackers to alter database queries via a crafted username. The endpoint assigns the GET u parameter directly to $username and concatenates it into three SELECT statements without sanitization. The upstream issue shows a direct request, but the later proof of concept requires an administrator session; neither artifact demonstrates database reads or writes.

CVSS severity9.8
Critical
EPSS probability5.21%
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 ForgotPassUserName.php in openSIS Community Edition 8.0 allows attackers to alter database queries via a crafted username. The endpoint assigns the GET u parameter directly to $username and concatenates it into three SELECT statements without sanitization. The upstream issue shows a direct request, but the later proof of concept requires an administrator session; neither artifact demonstrates database reads or writes.

The record

CVE
CVE-2021-40617
Published
Oct 11, 2021
Updated
Apr 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
PrivilegesUnavailable
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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