If the algebra filter was enabled but not functional (eg the necessary binaries were missing from the server), it presented an XSS risk.
[
{
"versions": [
{
"status": "affected",
"version": "4.1.0",
"lessThan": "4.1.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.0.0",
"lessThan": "4.0.7",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.11.0",
"lessThan": "3.11.13",
"versionType": "semver"
},
{
"status": "affected",
"version": "0",
"lessThan": "3.9.20",
"versionType": "semver"
}
],
"packageName": "moodle",
"collectionURL": "https://git.moodle.org",
"defaultStatus": "unaffected"
}
]