CVE-2018-25250

MyBB Last User's Threads in Profile Plugin 1.2 Persistent XSS

MyBB Last User's Threads in Profile Plugin 1.2 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts by crafting thread subjects with script tags. Attackers can create threads with script payloads in the subject field that execute when users visit the attacker's profile page.

Affected

MyBB · MyBB Last User's Threads in Profile 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 NVD

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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

0.20% chance of exploitation in the next 30 days, 9th percentile

Published

2026-04-04

Updated

2026-05-24

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/44339

Security advisories

• https://www.vulncheck.com/advisories/mybb-last-user-s-threads-in-profile-plugin-persisten…
• https://community.mybb.com/mods.php?action=view&pid=910

References

• CVE Record
• NVD entry