CVE-2025-30158Public exploitNetwork attack vector

Authenticated UI denial of service via oversized iframes

Published Apr 18, 2025 · Updated Apr 18, 2025

UI denial of service in the forum in NamelessMC Nameless 2.1.4 and earlier allows remote authenticated users to block forum controls. The getPurified method in core/classes/Core/Output.php allows iframe width and height attributes without limits, so posted embeds can cover the interface. Any authenticated account permitted to post topics, comments, or feed entries can persist the payload and disrupt forum interaction for users and administrators.

CVSS severity7.1
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI denial of service in the forum in NamelessMC Nameless 2.1.4 and earlier allows remote authenticated users to block forum controls. The getPurified method in core/classes/Core/Output.php allows iframe width and height attributes without limits, so posted embeds can cover the interface. Any authenticated account permitted to post topics, comments, or feed entries can persist the payload and disrupt forum interaction for users and administrators.

The record

CVE
CVE-2025-30158
Published
Apr 18, 2025
Updated
Apr 18, 2025
Vendor
NamelessMC
Product
Nameless
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NamelessMC · Namelessversion=< 2.2.0

Published CVSS scores

7.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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