How severe is CVE-2025-61658?

CVE-2025-61658 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-61658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61658?

CVE-2025-61658 primarily affects Mediawiki Checkuser. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-61658?

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

Does CVE-2025-61658 have an EU (EUVD) identifier?

Yes. CVE-2025-61658 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206654.

When was CVE-2025-61658 published?

CVE-2025-61658 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2025-61658

CVE-2025-61658 is a medium-severity vulnerability in Mediawiki Checkuser with a CVSS 3.x base score of 4.3. 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: Medium (CVSS 3.x base score 4.3)
CVSS v4: 1.3
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206654
Weakness: CWE-22
Affected product: Mediawiki Checkuser
Published: 2026-02-03
Last modified: 2026-06-17

Description

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/GlobalContributions/GlobalContributionsPager.Php. This issue affects CheckUser: from * before 1.43.4, 1.44.1.

Frequently asked questions

What is CVE-2025-61658?: Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/GlobalContributions/GlobalContributionsPager.Php. This issue affects CheckUser: from * before 1.43.4, 1.44.1.
How severe is CVE-2025-61658?: CVE-2025-61658 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-61658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61658?: CVE-2025-61658 primarily affects Mediawiki Checkuser. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-61658?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61658 have an EU (EUVD) identifier?: Yes. CVE-2025-61658 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206654.
When was CVE-2025-61658 published?: CVE-2025-61658 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://phabricator.wikimedia.org/T404805

Affected products (2)

cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:mediawiki:*:*
cpe:2.3:a:mediawiki:checkuser:1.44.0:*:*:*:*:mediawiki:*:*

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