Is CVE-2018-9230 actively exploited?

No active exploitation of CVE-2018-9230 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-9230 be exploited remotely?

Yes. CVE-2018-9230 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-9230?

CVE-2018-9230 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2018-9230

CWE-89Published: April 2, 2018· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In OpenResty through 1.13.6.1, URI parameters are obtained using the ngx.req.get_uri_args and ngx.req.get_post_args functions that ignore parameters beyond the hundredth one, which might allow remote attackers to bypass intended access restrictions or interfere with certain Web Application Firewall (ngx_lua_waf or X-WAF) products. NOTE: the vendor has reported that 100 parameters is an intentional default setting, but is adjustable within the API. The vendor's position is that a security-relevant misuse of the API by a WAF product is a vulnerability in the WAF product, not a vulnerability in OpenResty

NVD Source

Technical Analysis

CVE-2018-9230 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.