CVE-2026-100245Medium· 6.1▾ Sunlit

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Stored XSS. This issue affects Mediawiki - Wikibase Extension: from …

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score34/ 100 · Low

impact 33.6 · likelihood 0 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Sep 29, 2026

Updated

Sep 30, 2026

CVSS

6.1

Vendor

Wikimedia Foundation

Product

Mediawiki - Wikibase Extension

CWE

CWE-79

Depth score

34 · Low

EPSS

0.15% · p5

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

decided 2026-09-30

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 30.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 2 days

Sep 29, 2026Published
Disclosed via NVD
Sep 30, 2026Record revised
Last analysed / modified upstream
Sep 30, 2026EPSS first tracked
0.2%
Sep 30, 2026CVSS changed
— → 6.1
Sep 30, 2026Severity changed
none → medium

Wikimedia Foundation CWE-79 #nvd #cve.org

Affected

mediawiki_-_wikibase_extension < 1.46.1, 1.45.5, 1.43.10

Full technical detail▾

Overview

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Stored XSS.

This issue affects Mediawiki - Wikibase Extension: from * before 1.46.1, 1.45.5, 1.43.10.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Sep 30, 2026CVSS — → 6.1
Sep 30, 2026Severity none → medium

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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CVE-2026-100245Medium· 6.1▾ Sunlit

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Stored XSS. This issue affects Mediawiki - Wikibase Extension: from …

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score34/ 100 · Low

impact 33.6 · likelihood 0 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Sep 29, 2026

Updated

Sep 30, 2026

CVSS

6.1

Vendor

Wikimedia Foundation

Product

Mediawiki - Wikibase Extension

CWE

CWE-79

Depth score

34 · Low

EPSS

0.15% · p5

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

decided 2026-09-30

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 30.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 2 days

Sep 29, 2026Published
Disclosed via NVD
Sep 30, 2026Record revised
Last analysed / modified upstream
Sep 30, 2026EPSS first tracked
0.2%
Sep 30, 2026CVSS changed
— → 6.1
Sep 30, 2026Severity changed
none → medium

Wikimedia Foundation CWE-79 #nvd #cve.org

Affected

mediawiki_-_wikibase_extension < 1.46.1, 1.45.5, 1.43.10

Full technical detail▾

Overview

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Stored XSS.

This issue affects Mediawiki - Wikibase Extension: from * before 1.46.1, 1.45.5, 1.43.10.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Sep 30, 2026CVSS — → 6.1
Sep 30, 2026Severity none → medium

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org