What is CVE-2018-18546?

CVE-2018-18546 is a critical-severity vulnerability in Thinkphp, classified under SQL Injection. CVSS score: 9.8/10. Published 2018-10-21.

How severe is CVE-2018-18546?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SQL Injection in Thinkphp

CVE-2018-18546

ThinkPHP 3.2.4 has SQL Injection via the order parameter because the Library/Think/Db/Driver.class.php parseOrder function mishandles the key variable.

Vulnerability class: SQL Injection

Published 2018-10-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Thinkphp — versions 3.2.4

Weakness classification (CWE)

CWE-89 — SQL Injection

References

github.com/top-think/thinkphp/commit/9748cb80d2f24c89218f358ca2f5ab88ee33396f (Patch, Vendor Advisory)
98587329.github.io/2018/10/09/thinkphp注入分析/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18546?: CVE-2018-18546 is a critical-severity vulnerability in Thinkphp, classified under SQL Injection. CVSS score: 9.8/10. Published 2018-10-21.
How severe is CVE-2018-18546?: Critical severity. CVSS v3 base score is 9.8 out of 10.