How severe is CVE-2025-53370?

CVE-2025-53370 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2025-53370 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53370?

CVE-2025-53370 affects Starcitizen.tools Citizen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-53370?

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-2025-53370 have an EU (EUVD) identifier?

Yes. CVE-2025-53370 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19907.

When was CVE-2025-53370 published?

CVE-2025-53370 was published on 2025-07-03 and last updated on 2026-06-17.

CVE-2025-53370

CVE-2025-53370 is a high-severity vulnerability in Starcitizen.tools Citizen with a CVSS 3.x base score of 8.6. 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 8.6)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19907
Weakness: CWE-79
Affected product: Starcitizen.tools Citizen
Published: 2025-07-03
Last modified: 2026-06-17

Description

Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. From versions 1.9.4 to before 3.4.0, short descriptions set via the ShortDescription extension are inserted as raw HTML by the Citizen skin, allowing any user to insert arbitrary HTML into the DOM by editing a page. This issue has been patched in version 3.4.0.

Frequently asked questions

What is CVE-2025-53370?: Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. From versions 1.9.4 to before 3.4.0, short descriptions set via the ShortDescription extension are inserted as raw HTML by the Citizen skin, allowing any user to insert arbitrary HTML into the DOM by editing a page. This issue has been patched in version 3.4.0.
How severe is CVE-2025-53370?: CVE-2025-53370 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2025-53370 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53370?: CVE-2025-53370 affects Starcitizen.tools Citizen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-53370?: 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-2025-53370 have an EU (EUVD) identifier?: Yes. CVE-2025-53370 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19907.
When was CVE-2025-53370 published?: CVE-2025-53370 was published on 2025-07-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:starcitizen.tools:citizen:*:*:*:*:*:mediawiki:*:*

More vulnerabilities in Starcitizen.tools Citizen

CVE-2025-53368 — High (CVSS 8.6): Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. From versions 1.9.4 to before 3.4.0,…
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