CVE-2017-20127
CWE-89Published: July 13, 2022· Updated: Jun 17, 2026
Official Description
A vulnerability was found in KB Login Authentication Script 1.1 and classified as critical. Affected by this issue is some unknown functionality. The manipulation of the argument username/password with the input 'or''=' leads to sql injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
Risk Analysis
KB Login Authentication Script 1.1 contains a critical SQL injection vulnerability in its authentication functionality. Remote attackers can exploit this to bypass login controls or access sensitive database information.
A proof-of-concept exploit is publicly available, but it is not in the KEV catalog. The vulnerability is remotely exploitable with low attack complexity.
Update the script to a patched version or implement parameterized queries to prevent SQL injection.
Technical Analysis
CVE-2017-20127 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-89)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2017-20127 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts