How severe is CVE-2025-61648?

CVE-2025-61648 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-61648 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61648?

CVE-2025-61648 affects Mediawiki Checkuser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-61648?

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

Does CVE-2025-61648 have an EU (EUVD) identifier?

Yes. CVE-2025-61648 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206640.

When was CVE-2025-61648 published?

CVE-2025-61648 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2025-61648

CVE-2025-61648 is a medium-severity vulnerability in Mediawiki Checkuser with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
CVSS v4: 0.0
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206640
Weakness: CWE-79
Affected product: Mediawiki Checkuser
Published: 2026-02-03
Last modified: 2026-06-17

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js. This issue affects CheckUser: from * before 1.44.1.

Frequently asked questions

What is CVE-2025-61648?: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js. This issue affects CheckUser: from * before 1.44.1.
How severe is CVE-2025-61648?: CVE-2025-61648 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-61648 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61648?: CVE-2025-61648 affects Mediawiki Checkuser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-61648?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61648 have an EU (EUVD) identifier?: Yes. CVE-2025-61648 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206640.
When was CVE-2025-61648 published?: CVE-2025-61648 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://phabricator.wikimedia.org/T402077

Affected products (1)

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

More vulnerabilities in Mediawiki Checkuser

CVE-2025-67478 — High (CVSS 8.8): Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files…
CVE-2026-34090 — High (CVSS 7.5): Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser. This issue…
CVE-2015-2940 — Medium (CVSS 6.8): Cross-site request forgery (CSRF) vulnerability in the CheckUser extension for MediaWiki allows remote attackers to…
CVE-2019-18611 — Medium (CVSS 6.5): An issue was discovered in the CheckUser extension through 1.34 for MediaWiki. Certain sensitive information within…
CVE-2025-61651 — Medium (CVSS 6.1): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia…
CVE-2019-16529 — Medium (CVSS 5.3): An issue was discovered in the CheckUser extension through 1.35.0 for MediaWiki. Oversighted edit summaries are still…

All CVEs affecting Mediawiki Checkuser →

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 →