How severe is CVE-2025-62659?

CVE-2025-62659 has a CVSS 4.0 base score of 2.1, rated low severity.

Is CVE-2025-62659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-62659?

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

Does CVE-2025-62659 have an EU (EUVD) identifier?

Yes. CVE-2025-62659 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35582.

When was CVE-2025-62659 published?

CVE-2025-62659 was published on 2025-10-22 and last updated on 2026-06-17.

CVE-2025-62659

CVE-2025-62659 is a low-severity vulnerability with a CVSS 4.0 base score of 2.1. 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: Low (CVSS 4.0 base score 2.1)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35582
Weakness: CWE-79
Published: 2025-10-22
Last modified: 2026-06-17

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki CookieConsent extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki CookieConsent extension: from v0.1.0 before v2.0.0.

Frequently asked questions

What is CVE-2025-62659?: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki CookieConsent extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki CookieConsent extension: from v0.1.0 before v2.0.0.
How severe is CVE-2025-62659?: CVE-2025-62659 has a CVSS 4.0 base score of 2.1, rated low severity.
Is CVE-2025-62659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-62659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-62659 have an EU (EUVD) identifier?: Yes. CVE-2025-62659 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35582.
When was CVE-2025-62659 published?: CVE-2025-62659 was published on 2025-10-22 and last updated on 2026-06-17.

References

https://phabricator.wikimedia.org/T404475

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