CVE-2021-26599Public exploitNetwork attack vector

Database compromise via unsanitized groups parameter

Published Mar 28, 2022 · Updated Aug 3, 2024

SQL injection in include/findusers.php in ImpressCMS before 1.4.3 allows remote attackers to read or modify database data. The script passes the unsanitized groups POST value to icms_member_Handler::getUserCountByGroupLink() and getUsersByGroupLink(), which construct SQL queries from that argument. No authentication or user interaction is required; stacked queries permit administrator-account creation and arbitrary PHP execution.

CVSS severity9.8
Critical
EPSS probability20.97%
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 include/findusers.php in ImpressCMS before 1.4.3 allows remote attackers to read or modify database data. The script passes the unsanitized groups POST value to icms_member_Handler::getUserCountByGroupLink() and getUsersByGroupLink(), which construct SQL queries from that argument. No authentication or user interaction is required; stacked queries permit administrator-account creation and arbitrary PHP execution.

The record

CVE
CVE-2021-26599
Published
Mar 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS: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.

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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-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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