High
mediawiki — security advisory
In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)
- 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-2020-35475
- 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 messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)
osv:UBUNTU-CVE-2020-35475
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": "1aea2d23ae74bf976c87975820fcf8385633f1edef4340623bfde74570e99b07",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35475",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-35475",
"summary": "In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)",
"evidence": "osv:UBUNTU-CVE-2020-35475",
"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": "high",
"structured": {
"id": "UBUNTU-CVE-2020-35475",
"aliases": [
"UBUNTU-CVE-2020-35475"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-2020-35475.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-2020-35475.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-2020-35475.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-2020-35475.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-2020-35475.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-2020-35475.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-2020-35475.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": "2026-10-17T12:56:56.238720195Z",
"provider": "osv",
"upstream": [
"CVE-2020-35475"
],
"references": [
"https://ubuntu.com/security/CVE-2020-35475",
"https://phabricator.wikimedia.org/T268917",
"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-2020-35475"
]
},
"related_cves": [
{
"value": "CVE-2020-35475",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 356557,
"published_at": "2020-12-18T08:15:00+00:00"
}