What is CVE-2018-1000502?

CVE-2018-1000502 is a high-severity vulnerability in Mybb, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 7.2/10. Published 2018-06-26.

How severe is CVE-2018-1000502?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Mybb

CVE-2018-1000502

MyBB Group MyBB contains a File Inclusion vulnerability in Admin panel (Tools and Maintenance -> Task Manager -> Add New Task) that can result in Allows Local File Inclusion on modern PHP versions and Remote File Inclusion on ancient PHP versions. This attack appear to be exploitable via Must have access to admin panel. This vulnerability appears to have been fixed in 1.8.15.

Published 2018-06-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Mybb

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

www.batterystapl.es/2018/03/local-file-inclusion-and-reading.html (Third Party Advisory)
blog.mybb.com/2018/03/15/mybb-1-8-15-released-security-maintenance-release/ (Vendor Advisory)

Frequently asked questions

What is CVE-2018-1000502?: CVE-2018-1000502 is a high-severity vulnerability in Mybb, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 7.2/10. Published 2018-06-26.
How severe is CVE-2018-1000502?: High severity. CVSS v3 base score is 7.2 out of 10.