Medium
Security advisory
Mautic versions before 3.3.4/4.0.0 are vulnerable to an inline JS XSS attack when viewing Mautic assets by utilizing inline JS in the title and adding a broken image URL as a remote asset. This can only be leveraged by an authenticated user with permission to create or edit assets.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-27912
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:15 UTC · Revision 1
Source evidence
Mautic versions before 3.3.4/4.0.0 are vulnerable to an inline JS XSS attack when viewing Mautic assets by utilizing inline JS in the title and adding a broken image URL as a remote asset. This can only be leveraged by an authenticated user with permission to create or edit assets.
osv:CVE-2021-27912
Complete source record
{
"id": "d11413be683b39a9be2313937e60f34937950e79fa9e93e86fb3e0d58b3dd73c",
"url": "https://osv.dev/vulnerability/CVE-2021-27912",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-27912",
"summary": "Mautic versions before 3.3.4/4.0.0 are vulnerable to an inline JS XSS attack when viewing Mautic assets by utilizing inline JS in the title and adding a broken image URL as a remote asset. This can only be leveraged by an authenticated user with permission to create or edit assets.",
"evidence": "osv:CVE-2021-27912",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-27912",
"aliases": [
"CVE-2021-27912",
"GHSA-rh5w-82wh-jhr8"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mautic/mautic",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "2f4cf5264a1281d029f002858b41b4efb80d8e83"
},
{
"introduced": "823a23c4c0148841f7f23c33c56167cfb59d0c99"
},
{
"last_affected": "5431e0384d181972b22b532e33d30c7089f2ae63"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:acquia:mautic:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.3.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:acquia:mautic:4.0.0:alpha1:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0-alpha1"
},
{
"last_affected": "4.0.0-alpha1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:acquia:mautic:4.0.0:beta:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0-beta"
},
{
"last_affected": "4.0.0-beta"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:acquia:mautic:4.0.0:rc:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0-rc"
},
{
"last_affected": "4.0.0-rc"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"4.0.0-alpha1",
"4.0.0-beta",
"4.0.0-rc",
"3.3.3",
"3.3.3-rc",
"3.3.2",
"3.3.2-rc",
"3.3.0-rc",
"3.1.0",
"3.1.0-rc",
"3.0.1",
"2.14.2-beta",
"2.12.2-beta",
"2.8.0",
"2.7.1",
"2.7.0",
"2.6.1",
"2.6.0",
"2.5.1",
"2.5.0",
"2.4.0",
"2.3.0",
"2.2.1",
"2.2.0",
"2.1.1",
"2.1.0",
"2.0.1",
"2.0.0",
"1.4.1",
"1.4.0",
"1.3.1",
"1.3.0",
"1.2.4",
"1.2.3",
"1.2.2",
"1.2.1",
"1.2.0",
"1.1.3",
"1.1.2",
"1.1.1",
"1.1.0",
"1.0.5",
"1.0.4",
"1.0.3",
"1.0.2",
"1.0.1",
"1.0.0",
"1.0.0-rc4",
"1.0.0-rc3",
"1.0.0-rc2",
"1.0.0-rc1",
"1.0.0-beta4",
"1.0.0-beta3",
"1.0.0-beta2"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27912.json"
}
}
],
"modified": "2026-10-20T10:53:41.241958574Z",
"provider": "osv",
"references": [
"https://github.com/mautic/mautic/security/advisories/GHSA-rh5w-82wh-jhr8"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-27912",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384500,
"published_at": "2021-08-30T16:15:07.403+00:00"
}