CVE-2025-30158 HIGH

CVE-2025-30158: NamelessMC Forum iframe width/height abuse causing UI-based Denial of Service

Vendor Namelessmc
Product Nameless
Weakness CWE-400
Published April 18, 2025
Last update April 18, 2025
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

What the vulnerability does

01Description

NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, the forum allows users to post iframe elements inside forum topics/comments/feed with no restriction on the iframe's width and height attributes. This allows an authenticated attacker to perform a UI-based denial of service (DoS) by injecting oversized iframes that block the forum UI and disrupt normal user interactions. This issue has been patched in version 2.2.0.

Key dates

02Disclosure timeline

April 18, 2025 CVE published
April 18, 2025 Record updated