How severe is CVE-2025-6590?

CVE-2025-6590 has a CVSS 4.0 base score of 4.6, rated medium severity.

Is CVE-2025-6590 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-6590?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-6590 have an EU (EUVD) identifier?

Yes. CVE-2025-6590 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206629.

When was CVE-2025-6590 published?

CVE-2025-6590 was published on 2026-02-02 and last updated on 2026-06-17.

CVE-2025-6590

CVE-2025-6590 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.6. 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-200.

Key facts

Severity: Medium (CVSS 4.0 base score 4.6)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206629
Weakness: CWE-200
Published: 2026-02-02
Last modified: 2026-06-17

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php. This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.

Frequently asked questions

What is CVE-2025-6590?: Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php. This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.
How severe is CVE-2025-6590?: CVE-2025-6590 has a CVSS 4.0 base score of 4.6, rated medium severity.
Is CVE-2025-6590 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-6590?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6590 have an EU (EUVD) identifier?: Yes. CVE-2025-6590 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206629.
When was CVE-2025-6590 published?: CVE-2025-6590 was published on 2026-02-02 and last updated on 2026-06-17.

References

https://phabricator.wikimedia.org/T392746

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