CVE-2020-22819Public exploitNetwork attack vector

Database compromise via unescaped activation token

Published Nov 3, 2022 · Updated May 5, 2025

SQL injection in MKCMS 6.2 allows remote attackers to read or alter database data through the verify query parameter in active.php. The active.php handler strips escaping from the GET value and interpolates it inside a quoted u_question predicate passed directly to mysql_query. No authentication or user interaction is required; demonstrated time-based and UNION queries expose database confidentiality and integrity.

CVSS severity9.8
Critical
EPSS probability0.89%
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 MKCMS 6.2 allows remote attackers to read or alter database data through the verify query parameter in active.php. The active.php handler strips escaping from the GET value and interpolates it inside a quoted u_question predicate passed directly to mysql_query. No authentication or user interaction is required; demonstrated time-based and UNION queries expose database confidentiality and integrity.

The record

CVE
CVE-2020-22819
Published
Nov 3, 2022
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 3, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.

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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

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Technologies

Your stack

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Your stack

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