Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade mediawiki/core
to version 1.23.16, 1.27.2, 1.28.1 or higher.
mediawiki/core is a Free software wiki application developed by the Wikimedia Foundation and others.
Note: This package is not maintained on Packagist
anymore, but newer releases exist.
Affected versions of this package are vulnerable to Information Exposure via the attr()
function which can interpret attributes as different types, including 'URL', which is interpreted as a quoted sting with the url()
notation. This allows remote attackers to discover the IP addresses of Wiki visitors via a style="background-image: attr(title url);"
attack within a DIV element that has an attacker-controlled URL in the title attribute.