XSS in Mybb Downloads
CVE-2018-25248
MyBB Downloads Plugin 2.0.3 contains a persistent cross-site scripting vulnerability that allows regular members to inject malicious scripts through the download title field. Attackers can submit a new download with HTML/JavaScript code in the title parameter, which executes when administrators validate the download in downloads.php.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Mybb Downloads — versions 2.0.3
- Mybb Downloads Plugin — versions 2.0.3
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/44400 (Exploit, VDB Entry, exploit)
- community.mybb.com/mods.php (Permissions Required, Product, product)
- www.vulncheck.com/advisories/mybb-downloads-plugin-persistent-xss-via-downloads… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2018-25248?
- CVE-2018-25248 is a high-severity vulnerability in Mybb Downloads, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-04-04.
- How severe is CVE-2018-25248?
- High severity. CVSS v3 base score is 7.2 out of 10.