QGIS is a free, open source, cross-platform geographic information system. Prior to 3.44.12 and 4.0.0 through 4.2.3, QGIS Server renders feature data in WFS3 (OGC API Features) HTML responses without HTML escaping. Attacker-controlled feature.properties values from a published writable vector layer reach resources/server/api/ogc/templates/wfs3/getFeatures.html through QgsServerOgcApiHandler::htmlDump and the if_nullptr_null_str callback.
A user who opens an items HTML page can execute stored markup or script in the QGIS Server origin, which can expose the viewer's session data or issue authenticated requests with the viewer's privileges. This issue is fixed in version 3.44.12.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://github.com/qgis/QGIS/commit/1930e81c918818a4f5412219f8f7e470d2709f91
security-advisories@github.com
https://github.com/qgis/QGIS/commit/ca76fcac616dbf1c0446514fd6517296eb7c6904
security-advisories@github.com
https://github.com/qgis/QGIS/pull/66616
security-advisories@github.com
https://github.com/qgis/QGIS/pull/67044
security-advisories@github.com
https://github.com/qgis/QGIS/releases/tag/final-3_44_12
security-advisories@github.com
https://github.com/qgis/QGIS/security/advisories/GHSA-cr49-pm9v-m788
security-advisories@github.com