CVE-2017-20127Public exploitNetwork attack vector

Authentication bypass via crafted SQL credentials

Published Jul 13, 2022 · Updated Apr 14, 2025

SQL injection in KB Login Authentication Script 1.1 allows remote attackers to bypass login authentication through crafted credentials. The login handler incorporates username and password values into an SQL comparison without neutralizing quote-based input, allowing an always-true condition to change the query result. No account or user interaction is required; successful exploitation grants access as a database-returned user, while broader data effects are not publicly demonstrated.

CVSS severity7.3
High
EPSS probability1.28%
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 KB Login Authentication Script 1.1 allows remote attackers to bypass login authentication through crafted credentials. The login handler incorporates username and password values into an SQL comparison without neutralizing quote-based input, allowing an always-true condition to change the query result. No account or user interaction is required; successful exploitation grants access as a database-returned user, while broader data effects are not publicly demonstrated.

The record

CVE
CVE-2017-20127
Published
Jul 13, 2022
Updated
Apr 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 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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