Medium
mediawiki — security advisory
In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.
- Products
- mediawiki
- Affected versions
- 1:1.27.3-1, 1:1.27.4-1, 1:1.27.4-2, 1:1.27.4-3, 1:1.31.2-1ubuntu1, 1:1.31.5-1, 1:1.31.5-1ubuntu1, 1:1.31.5-2, 1:1.31.5-3, 1:1.31.5-3ubuntu1, 1:1.31.6-1, 1:1.31.7-1, 1:1.31.7-1ubuntu0.1~esm1, 1:1.35.3-1, 1:1.35.4-1, 1:1.35.5-1, 1:1.35.5-1ubuntu1, 1:1.35.5-1ubuntu2, 1:1.35.5-1ubuntu3, 1:1.35.6-1, 1:1.35.6-1ubuntu0.1~esm1, 1:1.39.4-2, 1:1.39.5-1, 1:1.39.6-1, 1:1.39.7-1, 1:1.39.7-1ubuntu0.1~esm1, 1:1.43.1+dfsg-1, 1:1.43.1+dfsg-2, 1:1.43.3+dfsg-1, 1:1.43.5+dfsg-1, 1:1.43.6+dfsg-2, 1:1.43.8+dfsg-1, 1:1.43.8+dfsg-2, 1:1.43.9+dfsg-1, 1:1.43.9+dfsg-1ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2020-35474
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:29 UTC · Revision 1
Source evidence
In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.
osv:UBUNTU-CVE-2020-35474
mediawiki
Fixed versions: Not specified
mediawiki
Fixed versions: Not specified
mediawiki
Fixed versions: Not specified
mediawiki
Fixed versions: Not specified
mediawiki
Fixed versions: Not specified
mediawiki
Fixed versions: Not specified
mediawiki
Fixed versions: Not specified
Complete source record
{
"id": "d23071fabd8a8d609e8d1913156a88f2ec4a196b91fcf43d1363d475474cbe17",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35474",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-35474",
"summary": "In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.",
"evidence": "osv:UBUNTU-CVE-2020-35474",
"products": [
{
"name": {
"value": "mediawiki",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.27.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.27.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.27.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.27.4-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.31.2-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.5-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.5-2",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.5-3",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.5-3ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.7-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.31.7-1ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.35.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.5-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.5-1ubuntu2",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.5-1ubuntu3",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.35.6-1ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.39.4-2",
"evidence": "/affected/3/versions"
},
{
"value": "1:1.39.5-1",
"evidence": "/affected/3/versions"
},
{
"value": "1:1.39.6-1",
"evidence": "/affected/3/versions"
},
{
"value": "1:1.39.7-1",
"evidence": "/affected/3/versions"
},
{
"value": "1:1.39.7-1ubuntu0.1~esm1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.43.1+dfsg-1",
"evidence": "/affected/4/versions"
},
{
"value": "1:1.43.1+dfsg-2",
"evidence": "/affected/4/versions"
},
{
"value": "1:1.43.3+dfsg-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.43.8+dfsg-2",
"evidence": "/affected/5/versions"
},
{
"value": "1:1.43.9+dfsg-1",
"evidence": "/affected/5/versions"
},
{
"value": "1:1.43.9+dfsg-1ubuntu1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:1.43.3+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:1.43.5+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:1.43.6+dfsg-2",
"evidence": "/affected/6/versions"
},
{
"value": "1:1.43.8+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "1:1.43.8+dfsg-2",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2020-35474",
"aliases": [
"UBUNTU-CVE-2020-35474"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1:1.27.3-1",
"1:1.27.4-1",
"1:1.27.4-2",
"1:1.27.4-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.27.4-3"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.27.4-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"1:1.31.2-1ubuntu1",
"1:1.31.5-1",
"1:1.31.5-1ubuntu1",
"1:1.31.5-2",
"1:1.31.5-3",
"1:1.31.5-3ubuntu1",
"1:1.31.6-1",
"1:1.31.7-1",
"1:1.31.7-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.31.7-1ubuntu0.1~esm1"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.31.7-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"1:1.35.3-1",
"1:1.35.4-1",
"1:1.35.5-1",
"1:1.35.5-1ubuntu1",
"1:1.35.5-1ubuntu2",
"1:1.35.5-1ubuntu3",
"1:1.35.6-1",
"1:1.35.6-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.35.6-1ubuntu0.1~esm1"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.35.6-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"versions": [
"1:1.39.4-2",
"1:1.39.5-1",
"1:1.39.6-1",
"1:1.39.7-1",
"1:1.39.7-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.39.7-1ubuntu0.1~esm1"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.39.7-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1:1.43.1+dfsg-1",
"1:1.43.1+dfsg-2",
"1:1.43.3+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.43.3+dfsg-1"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.43.3+dfsg-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1:1.43.8+dfsg-2",
"1:1.43.9+dfsg-1",
"1:1.43.9+dfsg-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.43.9+dfsg-1ubuntu1"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.43.9+dfsg-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/ubuntu/mediawiki?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1:1.43.3+dfsg-1",
"1:1.43.5+dfsg-1",
"1:1.43.6+dfsg-2",
"1:1.43.8+dfsg-1",
"1:1.43.8+dfsg-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35474.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "mediawiki",
"binary_version": "1:1.43.8+dfsg-2"
},
{
"binary_name": "mediawiki-classes",
"binary_version": "1:1.43.8+dfsg-2"
}
]
}
}
],
"modified": "2026-10-17T12:56:55.679231838Z",
"provider": "osv",
"upstream": [
"CVE-2020-35474"
],
"references": [
"https://ubuntu.com/security/CVE-2020-35474",
"https://phabricator.wikimedia.org/T268894",
"https://lists.wikimedia.org/pipermail/wikitech-l/2020-December/094126.html",
"https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html",
"https://www.cve.org/CVERecord?id=CVE-2020-35474"
]
},
"related_cves": [
{
"value": "CVE-2020-35474",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 356545,
"published_at": "2020-12-18T08:15:00+00:00"
}