How severe is CVE-2026-0670?

CVE-2026-0670 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-2026-0670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0670?

CVE-2026-0670 primarily affects Wikisource Proofread Page. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-0670?

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

Does CVE-2026-0670 have an EU (EUVD) identifier?

Yes. CVE-2026-0670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1167.

When was CVE-2026-0670 published?

CVE-2026-0670 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2026-0670

CVE-2026-0670 is a medium-severity vulnerability in Wikisource Proofread Page 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)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1167
Weakness: CWE-79
Affected product: Wikisource Proofread Page
Published: 2026-01-07
Last modified: 2026-06-17

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - ProofreadPage Extension: 1.45, 1.44, 1.43, 1.39.

Frequently asked questions

What is CVE-2026-0670?: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - ProofreadPage Extension: 1.45, 1.44, 1.43, 1.39.
How severe is CVE-2026-0670?: CVE-2026-0670 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-2026-0670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0670?: CVE-2026-0670 primarily affects Wikisource Proofread Page. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-0670?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0670 have an EU (EUVD) identifier?: Yes. CVE-2026-0670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1167.
When was CVE-2026-0670 published?: CVE-2026-0670 was published on 2026-01-07 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:wikisource:proofread_page:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikisource:proofread_page:1.45:*:*:*:*:mediawiki:*:*

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