What is CVE-2018-0537?

CVE-2018-0537 is a medium-severity vulnerability in Gundam Cult Qqq Systems, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-22.

How severe is CVE-2018-0537?

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

XSS in Gundam Cult Qqq Systems

CVE-2018-0537

Cross-site scripting vulnerability in QQQ SYSTEMS ver2.24 allows an attacker to inject arbitrary web script or HTML via quiz_op.cgi.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-03-22 · 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: 0.007 (51.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Gundam Cult Qqq Systems — versions ver2.24
Qqq Systems Project — versions 2.24

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jvn.jp/en/jp/JVN96655441/index.html (VDB Entry, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2018-0537?: CVE-2018-0537 is a medium-severity vulnerability in Gundam Cult Qqq Systems, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-22.
How severe is CVE-2018-0537?: Medium severity. CVSS v3 base score is 6.1 out of 10.