Vulnerability · Published Apr 18, 2025 · Assigned by GitHub_M

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

High 7.1

In plain English

A high-severity uncontrolled resource consumption in Nameless from NamelessMC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.6%top 53.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
NamelessMC	Nameless	< 2.2.0

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References

https://github.com/NamelessMC/Nameless/security/advisories/GHSA-2prx-rgr7-hq5f x_refsource_CONFIRM
https://github.com/NamelessMC/Nameless/commit/caa42a975338a13fbc1658e8c440108f16135643 x_refsource_MISC
https://github.com/NamelessMC/Nameless/releases/tag/v2.2.0 x_refsource_MISC