Medium
Security advisory
A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-43558
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:21 UTC · Revision 1
Source evidence
A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.
osv:CVE-2021-43558
Complete source record
{
"id": "55da16cd956f0a58761cb06bae73b01c7008aeaeb1777ae9053535689aed525a",
"url": "https://osv.dev/vulnerability/CVE-2021-43558",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-43558",
"summary": "A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.",
"evidence": "osv:CVE-2021-43558",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-43558",
"aliases": [
"BIT-moodle-2021-43558",
"CVE-2021-43558",
"GHSA-wpfp-q843-v772"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/moodle/moodle",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "6f7e3ca2f7e853a183559cfb6d10fa0eb8fc6877"
},
{
"introduced": "500c131eb49771e36f68d151dfa37fef5a9bc2df"
},
{
"fixed": "b02dd253b8e111cfa2c22883bb1d831c6f1f5f63"
},
{
"introduced": "ec58cefefb2722f61f77c9a2b6a12d40a8c078a0"
},
{
"fixed": "08534dff5030462233cede83148f8f6ba727f3a8"
},
{
"introduced": "94f2d3fc4b974c5c7d500988c56b7ca15f58d7ec"
},
{
"fixed": "e1ad263f906edb699a3f1dedaef90c90d8afe47d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "3.8.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.9.0"
},
{
"fixed": "3.9.11"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.10.0"
},
{
"fixed": "3.10.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.11.0"
},
{
"fixed": "3.11.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v3.11.3",
"v3.9.10",
"v3.10.7",
"v3.11.1",
"v3.11.2",
"v3.10.6",
"v3.9.9",
"v3.10.5",
"v3.9.8",
"v3.11.0",
"v3.10.4",
"v3.9.7",
"v3.10.3",
"v3.9.6",
"v3.10.2",
"v3.8.8",
"v3.9.5",
"v3.8.7",
"v3.10.1",
"v3.9.4",
"v3.9.3",
"v3.8.6",
"v3.10.0",
"v3.9.2",
"v3.8.5",
"v3.8.4",
"v3.9.1",
"v3.9.0",
"v3.8.3",
"v3.8.2",
"v3.8.1",
"v3.8.0",
"v3.8.0-rc1",
"v3.8.0-beta",
"v3.7.0",
"v3.7.0-rc2",
"v3.7.0-rc1",
"v3.7.0-beta",
"v3.6.0",
"v3.6.0-rc2",
"v3.6.0-rc3",
"v3.6.0-rc1",
"v3.6.0-beta",
"v3.5.0",
"v3.5.0-rc1",
"v3.5.0-beta",
"v3.4.0",
"v3.4.0-rc2",
"v3.4.0-rc3",
"v3.4.0-rc1",
"v3.4.0-beta",
"v3.3.0",
"v3.3.0-rc3",
"v3.3.0-rc2",
"v3.3.0-rc1",
"v3.3.0-beta",
"v3.2.0-rc2",
"v3.2.0",
"v3.2.0-rc4",
"v3.2.0-beta",
"v3.2.0-rc5",
"v3.2.0-rc3",
"v3.2.0-rc1",
"v3.1.0-beta",
"v3.1.0",
"v3.1.0-rc2",
"v3.1.0-rc1",
"v3.0.0-rc3",
"v3.0.0",
"v3.0.0-rc4",
"v3.0.0-rc2",
"v3.0.0-rc1",
"v3.0.0-beta",
"v2.9.0",
"v2.9.0-rc2",
"v2.9.0-rc1",
"v2.9.0-beta",
"v2.8.0",
"v2.8.0-rc2",
"v2.8.0-rc1",
"v2.8.0-beta",
"v2.7.0",
"v2.7.0-rc2",
"v2.7.0-rc1",
"v2.7.0-beta",
"v2.6.0",
"v2.6.0-rc1",
"v2.6.0-beta",
"v2.5.0",
"v2.5.0-rc1",
"v2.5.0-beta",
"v2.4.0-beta",
"v2.4.0-rc1",
"v2.4.0",
"v2.3.0",
"v2.3.0-rc1",
"v2.3.0-beta",
"v2.2.0",
"v2.2.0-rc1",
"v2.2.0-beta",
"v2.1.0",
"v2.0.1",
"v2.0.0",
"v2.0.0-rc2",
"v2.0.0-rc1",
"v1.3.0",
"v1.2.1",
"v1.2.0",
"v1.1.1",
"v1.1.0",
"v1.0.9",
"v1.0.8",
"v1.0.7",
"v1.0.6",
"v1.0.5",
"v1.0.4",
"v1.0.3",
"v1.0.2",
"v1.0.1",
"v1.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43558.json"
}
}
],
"modified": "2026-10-24T10:31:06.307410249Z",
"provider": "osv",
"references": [
"https://bugzilla.redhat.com/show_bug.cgi?id=2021515",
"https://moodle.org/mod/forum/discuss.php?d=429097"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:extra_packages_for_enterprise_linux",
"extracted_events": [
{
"range": [
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "35"
},
{
"last_affected": "35"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-43558",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 440956,
"published_at": "2021-11-22T16:15:08.237+00:00"
}