How severe is CVE-2025-61647?

CVE-2025-61647 has a CVSS 4.0 base score of 0.4, rated low severity.

Is CVE-2025-61647 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-61647?

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

Does CVE-2025-61647 have an EU (EUVD) identifier?

Yes. CVE-2025-61647 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206645.

When was CVE-2025-61647 published?

CVE-2025-61647 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2025-61647

CVE-2025-61647 is a low-severity vulnerability with a CVSS 4.0 base score of 0.4. 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-22.

Key facts

Severity: Low (CVSS 4.0 base score 0.4)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206645
Weakness: CWE-22
Published: 2026-02-03
Last modified: 2026-06-17

Description

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Api/Rest/Handler/UserInfoHandler.Php. This issue affects CheckUser: from a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4.

Frequently asked questions

What is CVE-2025-61647?: Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Api/Rest/Handler/UserInfoHandler.Php. This issue affects CheckUser: from a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4.
How severe is CVE-2025-61647?: CVE-2025-61647 has a CVSS 4.0 base score of 0.4, rated low severity.
Is CVE-2025-61647 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-61647?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61647 have an EU (EUVD) identifier?: Yes. CVE-2025-61647 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206645.
When was CVE-2025-61647 published?: CVE-2025-61647 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://phabricator.wikimedia.org/T399093

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