EUVD-2026-41118
GHSA-f5m8-q8gq-mjpw
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable XSS with no privileges required; UI:R used in CVSS 3.1 as victim page rendering constitutes user interaction; scope changes to victim browser context with low C/I impact.
Primary rating from Vendor (wikimedia-foundation).
CVSS VectorVendor: wikimedia-foundation
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - Charts Extension allows Cross-Site Scripting (XSS).
This issue affects Mediawiki - Charts Extension: from * before 1.43.9,1.44.6,1.45.4.
AnalysisAI
Cross-site scripting in the Wikimedia Foundation's MediaWiki Charts Extension allows network-accessible, unauthenticated attackers to inject malicious JavaScript into wiki pages that render chart content. All installations running the Charts Extension across the 1.43.x, 1.44.x, and 1.45.x branches prior to fixed releases 1.43.9, 1.44.6, and 1.45.4 are affected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The MediaWiki Charts Extension must be installed and enabled on the target MediaWiki instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) presents several high-concern signals simultaneously: network-reachable, low complexity, no attacker privileges required, and no user interaction required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker submits a crafted chart definition containing embedded JavaScript to a publicly editable MediaWiki instance with the Charts Extension active. The malicious payload is stored or processed without sanitization, and when any user - including administrators - browses a page that renders the poisoned chart, the attacker's script executes in their browser, enabling session token theft, credential harvesting, or unauthorized wiki actions on behalf of the victim. … |
| Remediation | Operators should upgrade the MediaWiki Charts Extension to the fixed releases corresponding to their active MediaWiki branch: 1.43.9, 1.44.6, or 1.45.4. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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