How severe is CVE-2025-54421?

CVE-2025-54421 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-54421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-54421?

CVE-2025-54421 affects Namelessmc Nameless. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54421?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-54421 have an EU (EUVD) identifier?

Yes. CVE-2025-54421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25144.

When was CVE-2025-54421 published?

CVE-2025-54421 was published on 2025-08-18 and last updated on 2026-06-17.

CVE-2025-54421

CVE-2025-54421 is a high-severity vulnerability in Namelessmc Nameless with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25144
Weakness: CWE-79
Affected product: Namelessmc Nameless
Published: 2025-08-18
Last modified: 2026-06-17

Description

NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS) vulnerability in NamelessMC before 2.2.4 allows remote authenticated attackers to inject arbitrary web script or HTML via the default_keywords crafted parameter. This vulnerability is fixed in 2.2.4.

Frequently asked questions

What is CVE-2025-54421?: NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS) vulnerability in NamelessMC before 2.2.4 allows remote authenticated attackers to inject arbitrary web script or HTML via the default_keywords crafted parameter. This vulnerability is fixed in 2.2.4.
How severe is CVE-2025-54421?: CVE-2025-54421 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-54421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-54421?: CVE-2025-54421 affects Namelessmc Nameless. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-54421 have an EU (EUVD) identifier?: Yes. CVE-2025-54421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25144.
When was CVE-2025-54421 published?: CVE-2025-54421 was published on 2025-08-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:namelessmc:nameless:*:*:*:*:*:*:*:*

More vulnerabilities in Namelessmc Nameless

CVE-2025-22144 — Critical (CVSS 9.8): NamelessMC is a free, easy to use & powerful website software for Minecraft servers. A user with admincp.core.emails or…
CVE-2025-54117 — Critical (CVSS 9.0): NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Cross-site scripting (XSS)…
CVE-2025-29784 — High (CVSS 7.5): NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, the s…
CVE-2022-2821 — High (CVSS 7.5): Missing Critical Step in Authentication in GitHub repository namelessmc/nameless prior to v2.0.2.
CVE-2025-30357 — High (CVSS 7.3): NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, if a…
CVE-2025-31118 — High (CVSS 7.1): NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, forum…

All CVEs affecting Namelessmc Nameless →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →