Description
Nextcloud Server before 10.0.1 & ownCloud Server before 9.0.6 and 9.1.2 suffer from Stored XSS in CardDAV image export. The CardDAV image export functionality as implemented in Nextcloud/ownCloud allows the download of images stored within a vCard. Due to not performing any kind of verification on the image content this is prone to a stored Cross-Site Scripting attack.
Remediation
References
Related Vulnerabilities
Joomla! Core 3.x.x Security Bypass (3.2.0 - 3.4.4)
WordPress Plugin Print-O-Matic Cross-Site Scripting (2.0.2)
WordPress Other Vulnerability (CVE-2005-1102)
Undertow Improper Input Validation Vulnerability (CVE-2020-1757)
WordPress Plugin Usernoise modal feedback/contact form Cross-Site Scripting (3.7.8)