CVE-2025-30158: NamelessMC is a free, easy to use & powerful website software for Minecraft servers

Q: How do I fix CVE-2025-30158?

nameless: upgrade to 2.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-30158 being exploited?

CVE-2025-30158 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-30158 affect?

CVE-2025-30158 affects nameless. Severity is high (CVSS 7.1). 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

Q: How urgent is CVE-2025-30158?

Priority 41/100. High severity; Public exploit reference

This month

HIGH 7.1UPGRADE

CVE-2025-30158 is a high-severity flaw (CVSS 7.1) affecting nameless. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-400
Published	2025-04-18
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: namelessmc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-18 16:15 UTCPublished CVE record published
2026-06-17 09:08 UTCUpdated Record last modified

namelessmc nameless UPGRADE

Affected: < 2.2.0

Fixed in: 2.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nameless || rpm -q nameless || nameless --version

2. UPGRADE to 2.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nameless

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nameless

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-30158?

nameless: upgrade to 2.2.0. Exact commands for each OS are on this page.

Is CVE-2025-30158 being exploited?

CVE-2025-30158 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-30158 affect?

CVE-2025-30158 affects nameless. Severity is high (CVSS 7.1). 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

How urgent is CVE-2025-30158?

Priority 41/100. High severity; Public exploit reference

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References

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