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CVE-2026-103443

API permits session-seeded javascript URL XSS

LOW
1.1
CVSS Score
Published: September 30, 2026 at 04:19 PM UTC
Updated: September 30, 2026 at 09:17 PM UTC
1 product affected across 1 vendorCollection

Using MediaWiki Collection (Book) extension by The Wikimedia Foundation?

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Severity
LOW1.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Collection (Book) extension allows XSS Targeting Non-Script Elements. This issue affects MediaWiki Collection (Book) extension: 1.46, 1.45, and 1.43.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://phabricator.wikimedia.org/T435822
Source: cverecord
https://gerrit.wikimedia.org/r/q/I51d973d4ace99fb6e584296f296efb0ff50339ce

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

1.1LOWwikimedia-foundation
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-80

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