What is CVE-2018-14392?

CVE-2018-14392 is a medium-severity vulnerability in Mybb New Threads, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-07-19.

How severe is CVE-2018-14392?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mybb New Threads

CVE-2018-14392

The New Threads plugin before 1.2 for MyBB has XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-07-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.486 (98.8th percentile), scored 2026-09-27.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.486 · newest: 0.486 · change: 0.000

Affected products

Mybb New Threads

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.exploit-db.com/exploits/45057/ (Exploit, VDB Entry, Third Party Advisory, exploit)
community.mybb.com/mods.php (Vendor Advisory)

Frequently asked questions

What is CVE-2018-14392?: CVE-2018-14392 is a medium-severity vulnerability in Mybb New Threads, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-07-19.
How severe is CVE-2018-14392?: Medium severity. CVSS v3 base score is 6.1 out of 10.