CVE-2018-25248

MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php

MEDIUM 5.1EPSS 0.2%

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.

Affected: MyBB · MyBB Downloads Plugin
CVSS v4.0 VULNCHECK: 5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 VULNCHECK: 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
EPSS: 0.22% chance of exploitation in the next 30 days, 12th percentile
Published: 2026-04-04
Updated: 2026-05-24

Proof-of-concept exploits (1)

https://www.exploit-db.com/exploits/44400

Security advisories

https://www.vulncheck.com/advisories/mybb-downloads-plugin-persistent-xss-via-downloads-p…
https://community.mybb.com/mods.php?action=view&pid=854

References

CVE Record
NVD entry