CVE-2020-15930: 
JavaScript vulnerability analysis and mitigation

An XSS (Cross-Site Scripting) vulnerability was discovered in Joplin desktop versions 1.0.190 to 1.0.245. The vulnerability, identified as CVE-2020-15930, allows attackers to execute arbitrary code through a malicious HTML embed tag. The issue was discovered and reported by Ademar Nowasky Junior (CVE MITRE).

The vulnerability stems from the application's handling of HTML embed tags, which could be exploited to execute arbitrary code. The issue affects Joplin desktop versions ranging from 1.0.190 to 1.0.245. The vulnerability was addressed by disallowing EMBED tags to prevent XSS attacks (Joplin Release).

The vulnerability allows attackers to execute arbitrary code through cross-site scripting attacks, potentially compromising the security of affected Joplin desktop installations. This could lead to unauthorized access to user data and potential system compromise (PacketStorm).

The vulnerability can be exploited by crafting malicious content containing HTML embed tags, which would then be processed by the affected Joplin desktop application (CVE MITRE).

The vulnerability was patched in Joplin version 1.1.4. Users are advised to upgrade to this version or later to mitigate the security risk. The fix involves disallowing EMBED tags within the application to prevent XSS attacks (Joplin Release).