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GHSA-3gm8-32vv-q8mpmedium

Moodle Cross-site Scripting vulnerability in the KSES text cleaning filter

Impact

The KSES text cleaning filter in lib/weblib.php in Moodle before 1.8.13 and 1.9.x before 1.9.9 does not properly handle vbscript URIs, which allows remote authenticated users to conduct cross-site scripting (XSS) attacks via HTML input.

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

moodle/moodle Packagist
Affected rangeRecorded fix
Earlier releases before 1.8.13Ecosystem versions1.8.13
From 1.9.0 before 1.9.9Ecosystem versions1.9.9

Version evidence: OSV · GHSA-3gm8-32vv-q8mp

View original version evidence (0 explicit versions)

Original source description

The KSES text cleaning filter in lib/weblib.php in Moodle before 1.8.13 and 1.9.x before 1.9.9 does not properly handle vbscript URIs, which allows remote authenticated users to conduct cross-site scripting (XSS) attacks via HTML input.

References