Semantic MediaWiki affected by Special:Ask table `sep` parameter reflected XSS
The advisory, in context
Failure mode
sep was inserted verbatim into the HTML that joins a table cell's values. This made it possible to inject HTML through the separator value. The same unsanitised table HTML is produced both for the standard Special:Ask render and for its raw request output (request_type=raw), so the injection was reachable without authentication.
Remediation
- In all non-wiki output modes (HTML, raw request, file),
sepis escaped unless it is a safe<br>variant. - This preserves legitimate line-break separators while blocking markup injection.
Maintenance note
If the table renderer ever gains richer separator semantics, keep the whitelist explicit. Do not expand the allowed HTML surface casually.
Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
Earlier releases before 7.2.0
Fixed in 7.2.0
78 explicitly affected versions
1.9, 1.9-RC1, 1.9.0.1, 1.9.0.2, 1.9.1, 1.9.1.1, 1.9.2, 1.9beta1, 2.0, 2.0-RC1, 2.0-RC2, 2.0-RC3, 2.1.0, 2.1.0-RC1, 2.1.1, 2.1.2, 2.1.3, 2.2.0, 2.2.0-RC1, 2.2.1, 2.2.2, 2.2.3, 2.3.0, 2.3.0-RC1, 2.3.1, 2.4.0, 2.4.0-RC1, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.6, 2.5.0, 2.5.0-rc.1, 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.5, 2.5.6, 2.5.7, 2.5.8, 3.0.0, 3.0.0-rc.1, 3.0.0-rc.2, 3.0.1, 3.0.2, 3.1.0, 3.1.0-rc.1, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.2.0, 3.2.0-rc.1, 3.2.0-rc.2, 3.2.1, 3.2.2, 3.2.3, 4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.2.0, 5.0.0, 5.0.1, 5.0.2, 5.1.0, 6.0.0, 6.0.1, 7.0.0, 7.1.0
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7.2.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9",
"1.9-RC1",
"1.9.0.1",
"1.9.0.2",
"1.9.1",
"1.9.1.1",
"1.9.2",
"1.9beta1",
"2.0",
"2.0-RC1",
"2.0-RC2",
"2.0-RC3",
"2.1.0",
"2.1.0-RC1",
"2.1.1",
"2.1.2",
"2.1.3",
"2.2.0",
"2.2.0-RC1",
"2.2.1",
"2.2.2",
"2.2.3",
"2.3.0",
"2.3.0-RC1",
"2.3.1",
"2.4.0",
"2.4.0-RC1",
"2.4.1",
"2.4.2",
"2.4.3",
"2.4.4",
"2.4.5",
"2.4.6",
"2.5.0",
"2.5.0-rc.1",
"2.5.1",
"2.5.2",
"2.5.3",
"2.5.4",
"2.5.5",
"2.5.6",
"2.5.7",
"2.5.8",
"3.0.0",
"3.0.0-rc.1",
"3.0.0-rc.2",
"3.0.1",
"3.0.2",
"3.1.0",
"3.1.0-rc.1",
"3.1.1",
"3.1.2",
"3.1.3",
"3.1.4",
"3.1.5",
"3.1.6",
"3.2.0",
"3.2.0-rc.1",
"3.2.0-rc.2",
"3.2.1",
"3.2.2",
"3.2.3",
"4.0.0",
"4.0.1",
"4.0.2",
"4.1.0",
"4.1.1",
"4.1.2",
"4.1.3",
"4.2.0",
"5.0.0",
"5.0.1",
"5.0.2",
"5.1.0",
"6.0.0",
"6.0.1",
"7.0.0",
"7.1.0"
]
}