XSS in Mybb My Arcade
CVE-2018-25249
MyBB My Arcade Plugin 1.3 contains a persistent cross-site scripting vulnerability that allows authenticated users to inject malicious scripts through arcade game score comments. Attackers can add crafted HTML and JavaScript payloads in the comment field that execute when other users view or edit the comment.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (15.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Mybb My Arcade — versions 1.3
- Mybb My Arcade Plugin — versions 1.3
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/44186 (Exploit, VDB Entry, exploit)
- community.mybb.com/mods.php (Product, product)
- www.vulncheck.com/advisories/mybb-my-arcade-plugin-persistent-xss-via-comment (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2018-25249?
- CVE-2018-25249 is a medium-severity vulnerability in Mybb My Arcade, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-04.
- How severe is CVE-2018-25249?
- Medium severity. CVSS v3 base score is 6.4 out of 10.